For me it would be the guitar because I love to sing the lyrics to the songs as well. I actually took acoustic guitar lessons many years ago and learned to play Color My World by memory as my "final exam". A guitar is good because its portable.

Sadly I let the classes and practice lapse since my voice sounds like a croaking frogs, I believe the term Johnny One Note was always identified with my voice.

I taught myself piano when I was young, but I haven't played in ages. I picked up on a friend's keyboard recently & got a little bit out, but I was so rusty! I'd love to start up again, but I don't own my own keyboard, so it'd be a little tough.

I am in no way musically talented. The only thing I do is write lyrics....

My husband is an amazing guitar player! He can listen to a song and play it back from memory--perfectly! He plays and owns many electric and acoustic guitars.

I play a little piano, can hold a tune on the flute, and have started the sax.

I do not play a instrument but would love to learn to play the violin. I know they are expensive so I will have to plan to save for one. I never played one in school I was always in the choir singing instead.

I already play guitar and piano but I really want to play the theremin! It just has such a unique sound.

Piano, I just love the way it sounds. I actually had piano lessons as a kid, but never had talent or patience to learn how to play properly.

In elementary school/middle school i played flute, and getting into high school i picked up bass guitar - which i wish i had stuck with. I can barely remember how to play some tabs, but i do pride myself on still knowing hot to hold a guitar correctly. I'm realizing now, having so many friends in local bands what a great skill it would be and how nice it would be to just jam with friends once in a while. If i could afford to get a new bass i would since i sold my chepo one a while back. Picking up the flute again would be pretty awesome as well, but that one was pretty hard and i just cant see me having the time to work on it with school as well.
My partner is a drummer, and i've played around on his set a few times to find it's a terribly hard instrument to play and requiers much more hand/foot coordination that i can mustar. A friend of mine happens to be a guitar teacher and is supposed to start skype lessons with him soon since he owns one, but has no real idea how to play.

I guess you could count my own voice box as well. I did chorus since elementary school until i went into a private high school that didnt have a program for it. My mother still encourages me to join a local chorus group but after having been a smoker for 7+ years i'm not sure if it's really a tallent of mine anymore. I've had plenty of friends joke about/ask why i'm not currently in a band and how my partner and i should start one together. The most i do now is just sing-a-longs to bands with friends or in the car, and very rarely will sing my partner to sleep (after he once asked me to when he found i sing to myself when i feel really nauseous).

Either a guitar or piano would be pretty awesome. Guitar seems fun, piano seems classy