I used to have problems with it in the past, but I have none today. It's just a matter of switching to better designed games - ones that don't create conflicts between the fiction and the system, but have them support each other (often including "things must make sense in the fiction, by group judgement" a mechanical rule). Sometimes, the same players who I perceived as problematic in D&D or old WoD games play very well in Nobilis, Fate, Cortex+ or PBtA games.
From this, I conclude that the problem lies not in players, but in games. If the design is not internally conflicted, the problem disappears.