I somewhat understand what you are saying although I dont agree in the case I think its a such thing as fleshing out a character to much.i just never needed to know that information about that character. I never once wondered "hmm, I wonder where Vader goes after work." it was just fukkin dumb. seemed like something Lucas would insert in a recut for no reason. "it always bugged me that we never saw Vader off the clock." that's like some Robot Chicken shyt. just saying the words "Darth Vader's Castle" sounds so ridiculous to me.
and as Ed said below, the friggin water tank... i don't know.