Agreed. I had a post a little while ago where I "at'd" the OP, because I'm not sure any of this is helpful to the OP, as opposed to entertaining to the participants... which, you know, I can always go all Maximus ... ARE YOU NOT ENTERTAINED????To bring this back to the OP.....I think that any system that lacks mechanics that support the character driven style of play would be a "con" so to speak. It's a weakness of that game as it relates to this goal.
So if someone said "I'd like to play a RPG that is more character focused than adventure focused", which response would be better:
"Here's a game that has tools that will help you create character focused play."
"Here's a game that has no such tools. But it doesn't really have any obstacles if you want to kind of do it on your own while you play."
Obviously, based on the differing stances in this thread, there's no right answer.
It really depends on what the OP wants. I know that for my own purposes, there are different "types" of character-driven play, and the emergent character-driven play from, say, a long OSR campaign is different than that of a "pure" Amber campaign ... neither is better, but they are different.