I feel like my sense of balance is definitely a bit above average. I don't think I necessarily trained myself in a specific way, I just liked climbing trees and other things like that when I was young. I also did various balance-involving sports and hobbies over the years, mostly because they were fun for me. I'm not like gymnast-level or anything like that, but I've been told by friends and acquaintances many times that my sense of balance is quite good, usually after they see me do some kind of balancing movement very reflexively.

Probably a factor in why I'm such too.

I guess you could add climbing and being OK with heights in there as well. I'm also fairly competent with tying knots, but not really educated in tons of different kinds of knots.

Oh, and recognizing voice actors is pretty easy for me. Like if I've heard the actor's voice before, I can usually figure it out. I'm very much a deep listener with music too, so maybe the sound and balance thing are kind of related, both being ear-specific abilities. Never thought of that before. The listening thing can be kind of annoying at times too. I'm often the only person that can hear some subtle noise, and feel like a weirdo trying to track down some strange background sound. But I usually can find the source eventually.