I think you can be made for an instrument. It's weird, but I think someone's personality can really dictate the most likely candidate for an instrument.
Example:
Trumpets-generally very cocky people, love to show off
Horns/Mellos-just like the nickname implies, usually very mellow
Saxophones-Kinda calm, quiet, but can suprise you
Drummers/Percussionists-Crazy, cocky, and overall goofballs
Flutes-can be bipolar. The nicest people around certain people, but also known to gossip and even insult others.
These are generalities, so not ALL people will be like this. Usually, though, these are your groups of people