I'm always looking for new Anime to watch, but it can be hard to know where to begin. I've seen most of what's considered a must-watch, and I'll list what I can remember off-hand:
-Full Metal Alchemist
-Monster *
-Death Note *
-Trigun
-Elfen Lied
-FLCL
-Ergo Proxy
-Berserk
-Samurai...