The multi-verse theory indicates that in several possible universes I am a clown made out of candy. But in none of them do I dance.
~ Sheldon Cooper

Leonard: At least I didn't have to invent 26 dimensions just to make the math come out.
Sheldon: I didn't invent them. They're there.
Leonard: In what universe?
Sheldon: In all of them, that is the point!

Other than that, I really haven't given it much thought.

I hold it in my mind as a possibility. But, proved true or not, I doubt it would change how I live my daily life.

I wouldn't go so far as to say I'm a fan of it in the same way I'm not a fan of gravity or quantum entanglement. I accept it as one of the many possibilities. After all, if a quantum fluctuation can produce one and there is no reason to believe that there could be but one occurrence, then it is reasonable to consider the possibility of another occurrence, or ten, or a thousand, or a....

It is also not beyond belief that these fluctuations could produce all sorts of differing systems wherein physics as we understand it would not apply. These variations would likely be small for the most part, but what if the universe next door were one in which antimatter had won the toss? I don't think I'd like to collide with that one.

I entertain the notion of a multiverse as a possibility. I don't consider myself a fan though. It's certainly a subject that has been explored in science fiction. I find the theory to be entirely plausible.

Find the theory fascinating and have just started reading about the different societies that are said to be living among those dimensions

I have difficulty in getting my head around how it would affect our own universe. But I recently read a book called "Time Travel in Einstein's Universe" and getting one's head around some of those concepts was just as difficult. Notwithstanding, I guess it's possible since apparently the maths permits it.

I love thinking about stuff like this. I think it's likely one of those theories that is hard to prove. But it's fun to think about.

I found myself wondering the other day if the multi-verse theory was compatible with determinism. Is it possible that there are many universes out there and they're all identical? I guess of the molecular level they be different since quantum stuff seems to be the only stuff that's really random. But at a higher level other universes might look identical to ours.

Absolutely.
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I'm re-reading Max Tegmark's "Our Mathematical Universe". It seems to be the only way the "Wave Equation" can be maintained without collapse.
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Schrödinger's cat survived in one Universe, it died in a different one.
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This is an absolutely fascinating topic.. I can't do the math (yet), but the science is actually quite accessible.
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Yes, the concept is interesting.

Only as it applies to Rick & Morty although I rather like the idea that there's another version of me out there someplace living a better life.

I would have to say, most definitely, yes. Some of the dreams that I have, which are not recurring by the way - but a 'continuation' of a previous dream are why I feel this way. It is as if I am acting in at least four different constructs, or actual 'lives', ongoing. The longer that I meditate and spend time on 'this' spiritual/non-religious path I become aware of more of them. When I am in the dreams I am with my same family, yet different lifestyles and things are happening, that are not happening here, now. They are not 'wishes' either, nor are they some BS psychological notion of exploring other possibilities of what ifs, I am actually LIVING in them. It is the only explanation and I have been meditating and on a hard core spiritual path for close to 40 years. I have seen some stuff people would just not believe, and I now must accept this as it is becoming more evident. I am also a scientist and scholar, so the weight of that is behind my findings as well.

Multi-verse isn't a scientific theory, it's predicted by several scientific theories, the primary one being infinite inflationary theory as conceived by Alan Guth, MIT.
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Since inflationary theory has had a number of successful predictions, i.e. the flat geometry of space-time which has been confirmed by the evidence, inflationary theory's other predictions, i.e. the Multi-verse prediction, are scientifically plausible and valid unless evidence shows otherwise.
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Right now a search of the cosmic background radiation maps is being done looking for fingerprints of collisions between multiple universes.
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It should be noted there are 4 different kinds of Multi-verses postulated by theorists. The concept of different dimensions is not required for the first three types. That's why collisions would leave it's mark on the background radiation.
dr

Do you know the story of The Man from Taured?
This is a documented fact that can't be explained apart from Parallel Universe....Have you notice the word Parallel have 2 Ls as in a parallel ?

[imdb.com]

Seen it?

Works for comic books. Yeh i love the idea.

I think it's ridiculous. A belief based in emotion and not logic.

I am a strong believer in Multiverse , I do not think that the Universe we live in is the only one , The laws of existence does allow it ...........

I look forward to the point where math can catch up with and prove/disprove these theories. Fun to think that math genius is out there as a 5 year old.....one day.....

Yes, it makes sense to me, and works with big bang,(creation) theories !

Not sure,I did read one astro physicist not so long ago saying about the 11 other Universe theory and he said why 11, why not more or less. I m no expert but I like the Hologram version of the Universe..apparently everthing works on a macro/quantum level if we were we existed in a 2 Dimensional Universe.This theory is we are all a 3D hologram projected from a 2D source...and black holes are 2D spaces sucking up 3D matter.

[sciencedaily.com]

[futurism.com]

Only the Family Guy version!

I steer more toward an Omniverse route as it is more diverse than a Multiverse route and besides, I know that the universe as we perceive it from Earth is already a spectacular place, full of wonders and surprises, saying that, it stands to reason that somewhere out there, it is possible that both multiverse and omniverse conditions exist.

Certainly. I find it only reasonable there are multiple universes, but am not so arrogant to claim there are. Nevertheless, I imagine they may be hierarchical with each successive 'verse requiring lifeforms to have evolved well beyond a primitive state. How to prove such? I may never know, unless perhaps I'm fortunate enough to experience it. Or others will...and have....

It certainly partially addresses the question of - what banged?

Me! I'm a fan with that theory because there are still a lot to find within the voids of space. Although how wish I could still be here when multiverse becomes a reality.