I don't find roll play vs role play to have anything to do with optimization or power gaming.
Some people like the acting and getting into character. Some like play the game like table war game of rules and mechanics. I like both personally. Sometimes I'm just not into getting into character and roleplaying and I just want some tactical combat with loot and experience watching my character grow. Mostly I get my fix of this from video games. When we get together to game I like to get into character and roleplay as it's fun social activity. But sometime I'm just no in mood for.
So what we do is have two games. The roleplaying game and table top war game of combat where you don't really get into character play the game like a game chess.