cowboy bebop, used to watch it as kid somewhere in 2003 on MTV, watched all 26 episodes earlier this year and was mindblown.

other anime i watched and could recommend would be samurai champloo, neon genesis evangelion and trigun (aside from DBZ which i loved as a kid).
 
BACCANO!

im about five episodes away from finishing it. I don't really know how to describe it without spoiling the whole thing. It's set in 1930's America. There's a good sized cast and the stories are jump around and intertwine at the same time (kind of like that movie Short Cuts, if you've ever seen it)

I took a break from anime for awhile, mostly cause all my friends were watching Naruto and I didn't really care for that show. This is my first venture back into anime and jesus christ it is amazing.
 
Serial Experiments Lain, the best.....thing, ever. And Cowboy Bebop, Trigun, Neon Genesis Evangelion, Excel Saga (if you love random humor, otherwise ehhhh), and Revolutionary Girl Utena.
 
Bleach is quite good.
But you can guess what will happen next so it becomes a bit boring :/
 
Code Geass, Black Butler, and Death Note are ones that I didn't notice right away on your list. Those you should for sure give a shot. You didn't specify FullMetal Alchemist: Brotherhood. So if you haven't seen that. For sure that!
 
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Too lazy to look through every single post, Deadman Wonderland. Only anime I've ever liked.