I think Kthulhu makes a good point in older systems there where less rule options so to make your character different you had to use good role playing to make them unique
Where as now you just go down a list of options in the rule books to get the character you want to play it requires less imagination as there are rules for almost everything.
Now I'm not totally against have plenty of choices for characters and I think that the feat system is one of the best parts of 3.x and PF
But they need to be used as an aid in role playing to develop your character not just a list of bonuses to add more math to the character
I'm sure we all know players who pick strange Feats and extra classes JUST for the mechanical bonuses they give and not because they make for a fun and unique character
This of course is all just my opinion