Yeah...
I made the last one, though there was probably one before that. (I recently joined, so I don't know what's gone on before my time)
I've been reading manga since early 2001, beginning with Nausicaa and Berserk. I got heavily interested in it in mid-2002 when I discovered Yokohama Kaidashi Kikou, which I still consider to be the best manga I've ever read.
I mostly stick with manga that I can connect with on some personal level, and tend to be bored with action series and the like (with exceptions, like Berserk)
My favorites are:
Yokohama Kaidashi Kikou
Angel Densetsu (one of the few Shounen Jump series I can tolerate)
Real
Monster
Planetes
Touch
"Fun" series: (not favorites, but still pretty damn good)
Death Note
Gantz
Berserk
MPD Psycho (some of the most exciting action scenes I've seen are in the 7th/8th volume of this one. The actual story is a bit too weird though)
Anything by Naoki Yamamoto
Anything by Jiro Taniguchi
20th Century Boys
Homunculus (this would is an awesome read for aspies... as it gets down to the core of all those "non-verbal signals" that are commonly used (albeit heavily exxagerated and metaphorical))
Mushishi
Eden: It's an Endless World!