I pretty much know most of my ancestry, but I've always been curious, like if there's a 1% or 2% strain that's totally out of left field... Wondering if it's worth it.
Yep. Not the DNA test (I did that with 23andMe) but research into family history.
If you have any fears of your results being used by others without you permission you may wish to rethink it. Albeit a cool idea, and it seems to have gotten better with results, know that your information is not secure. They are required to give it up to law enforcement. Whether that is good or bad is debatable and I haven't chosen a side yet. Im not sure of Ancestry specific waiver, but most sites can, if they ever so choose to do so, sell your information.