Truthfully I could care less about alien races, i really get into my character, thats why I have yet tro play a game as a female, so being an alien isn't out of the question, but if they have the same stats as a human then theres no point
As for Luke being the most powerful force user, I believe thats true, But what about Leia? Ah yet another crappy aspect of the writtings of the EU. After a while she should be as powerful as Luke