We've had this discussion before, but if the only part of the game that matters to you is the dramatic/thespian parts of the game, why not play a story game or simply freeform narrate instead? If you're using a system, the system should matter.
I stand by my statement; the amount of "roleplay" at a table is entirely uncorrelated to the mechanical complexity of a system. A game with more mechanical complexity will have more distinct characters because you differentiate on both the mechanical axis and the dramatic/thespian axis.