and how they have to control their gameplaying to prevent becoming some sort of a god in the game
but I honestly haven't run into that problem yet.
I'm a level 34 Nord using one-handed attacks, destruction spells, shields and conjuration.
I don't know if it's because I've spread myself out too thin but I haven't run into any dungeon/quest that is too easy for me.
I near consistently feel that the game is challenging enough (at expert level) and I don't have to limit myself to keep it that way.