i use pit because he has the most potential for growth, his moves fit my style better than any1 else has in this game, and because i like the feel of him the most. not to mention aside from the pit is gay joke, pit is actually really cool.
he is practically the fusion of marth, falco, and MK, but he lost range, lazer priority on projectile, and got priority, projectile control, and WOI instead. he is like marth as his moves have noticable sweet spots and crits (mostly near their tip too), he has pretty fast attacks, and is high learning curve.
he is like mk in regards to recovery being superior to everyone but MK, high priority, aerial control, and that dair animation (lol, but 4real).
he is like falco because no1 out camps pit (falco camps him equal if both play smart), and he has hella cgs and throw follow ups, and a great jab (albeit frame 5).
also his WOI, unique move properties (dtilt spike for example), and arrows that we have full control over allow for one of the most vast and varied sets of ATs in the game.
oh yeah he has no real bad MUs excep mk. wario aint that bad now that i played a few at whobo and learned the match up really well. also apparently others can do well with pit vs g&w so if i learn that it just leaves MK.
this is why i like pit anyways....
EDIT:
below this post is the truest statement on the page