I would shut down my collie Ida's ability to make sound; inside or out she has an amazing ability to wake me. Oh wait you said my senses, I guess that answer works anyway.
Sense of direction: up, down, left, right - more importantly sense of gravity (?). Of course, that uses the stricter meaning of "sense". I.e. we actually have more than 5 senses.
Imagine: weightlessness while sleeping. Wouldn't it be infinitely more comfortable?
I guess taste. I hate vegetables and id probably be skinnier and healthier
My sight because I find it easier to sleep in the dark.
If I get it back then I’d say touch. I have such a hard time getting comfortable at night and I have chronic back pain so if I couldn’t feel anything I think it would be a lot easier.
Taste, to avoid morning breathe until after I rinse my mouth out in the morning.