Frank your Majesty said:

Also, when he finally attacks the Emperor, he's stopped by Vader, what makes you think Vader wouldn't have stopped Luke, if he tried that earlier?

I'm sure Vader would've tried to stop Luke, but he could've still tried to disarm him like in the end does (but without using the darkside).

Frank your Majesty said:

His plan was not getting tempted by the dark side and bring his father back to the light side.

What about his two-movies-long jedi training? Just to get killed by the Emperor? Still doesn't make sense to me :\

Frank your Majesty said:

You question Luke's motives as soon as he leaves Tattoine, but not his plan to rescue Han? In my eyes that's the most illogical thing in that movie :D

I agree, that was confusing as well :D

It's just that I wanted to focus the thread on the second part of the movie.