I plan to know at least over 5 instruments at some point, I already play Guitar. What I'm looking for:
- Something somewhat uncommon/unusual
- More ability to be usable in heavier styles such as rock
- Easy to maintain, something small would be good.
While some of these aren't exactly unusual, here's what I've found from months of research: Sitar, Harmonica, Mandolin, Ukulele, Keytar, Melodica, Accordion