"Admiration is the emotion farthest from comprehension" - Aizen.
"Don’t use such strong words, it only makes you look weak " - Aizen.
"When you're up high, all the stuff that looks confusing and messed up... suddenly becomes crystal clear."- Senna.
"You are slow, even when falling" - Byakuya.
I think Aizen has some of the best quotes, the way he was made to words things and think makes them very different then the other characters of Bleach.