Roleplayer from a storyteller kind of angle. A good story needs good characters who act believably. Probably sometimes my PC is influenced by my own personality as well.
That said, I don't find weak character builds fun. While I won't min-max all the way and often have no 8's in my ability scores, I will play efficient builds and play them in an efficient way. That's why Larian's OP exploits bug me to hell - the smart characters would use anything at their disposal i.e. cheese the encounters. But that would just kill any fun i.e. challenge in the gameplay.
