I can play things like woodwinds, brass, and even uncommon instruments like the didgeridoo, however, those are instruments that I don't feel my skills would be good enough in for performance.
The only instrument I really can't play is guitar. It's an instrument that takes a lot of dedication to get really good at and I've not had the time or willingness to give it the dedication it needs to really take it to a professional level which I would be happy with.
I mostly play percussion (drumset, hand drums, vibes, marimba, etc.), keys (piano, organ, synth), baritone ukulele, and live electronics/processing. I also sing and play guitar, bass, and wooden flutes a bit.
I play guitar, keys and drums, but I'd have to say my best instrument is bass guitar. It's the only one I could walk away from for a year and then pick right back up. (If that makes any sense.
I play piano/keyboard, bass, guitar, drums, and sing. I am solid at all of those, solid enough to play in a band. but my best is piano. I've been playing piano for 8 years. I've been playing bass and drums for two years. and have sang since birth.lol.