Well, I wouldn't really want more natures in the game... Since all that would do is make it harder for me to get the the natures I need. -_-
But, I guess if I were into choosing natures for fun... I'd want something like... Goofy. Or Silly or whatever
And probably others... I can't think of them at the moment, though.
Maybe I'll post more later >_>
EDIT: Oh...and maybe something like Curious, Faithful, and Stubborn...
Yeeeah.