Mass Effect or Fallout 3?

I think it is a matter of personal opinion, I prefer Fallout 3, it has alot of meat on its bones, and I like the dystopian setting of it.

Mass Effect seemed too "clean" for me, better animated characters, and a decent story. Sadly in Mass Effect it quickly becomes a "seen that done that" type of game, where you feel that very little is offered to you in terms of new things to do.

Im not far enough into Fallout 3 to say if it falls into the same trap, if it is alot like Oblivion it will, but im optimistic, since the start is pretty good.

I might sound negative, but I am not, both games are quite good and offer a good time through them.