i've got a list!!
outlaw star- great show, awesome animation, really good balance of funny and serious
fullmetal alchemist- i'm sure you know about that one, it's big, and rightly so because it's amazing
witch hunter robin- dark and filled with magic and plot twists, animation is super
serial experiments lain- great animation, good story as well, nice and different
gundam wing- most amazing anime from the mid 90's, it makes mecha cool
azumanga daioh- cute, hilarious, and just plain awesome, a must see
blue submarine number 6- a great mix of cg and animation, and the music is jazz-like, something really different than most animes. the story is great, as is the animation and everything else
wolf's rain- ok this one you really have to see, it's soooo amazing, the animation is great and the story will keep you guessing
sailor moon- you have to have seen it, but i'll put it up for good measure
and i could go on, but i think that's probably enough o.O