Everyone should learn piano, it makes it way easier to understand theory, cos it's physically such a linear instrument. Not to mention it's so damn versatile. I've finished my 8th grade in piano and i'm still loving it. It's also way cheaper to play piano than guitar, no need for gear upgrades, tube replacements, new strings every month, picks, etc.
AND it makes you appreciate jazz and classical music, which is great.
I'd like to be able to play drums (well). I can play a few basic beats and fills, but i'm worse than useless with a double kick :oops: .