Right now, besides the obvious One Piece (in no particular order):
GTO ; Great Teacher Onizuka - I LOVE this thing! When I first looked at it and read some summaries, I thought this would be kinda dumb, but its awesome! I'm at chapter 169, and I can't find anymore… Finished all the anime yesterday night and checking out the Live Action right now. Good stuff I tell ya.
Naruto I guess… - I don't really care much about it, but I'm still keeping track on what happens next. Now that I think about it, I should go update myself right now, haven't checked for new chapters for a few weeks.
Pastel - Interesting stuff. A bit different than your normal Romantic Comedy. Often updated.
Ichigo 100% - Now this is your typical Romantic Comedy. Its fun, but nothing much more than that. It is EXTREMELY addictive though! I update myself whenever I find out another chapter gets out.
Rave/Groove Adventure Rave/Rave Master Whatever you call it.. - Yeah, this is pretty bad. I'm too lazy to look for the chapters that I don't have, but I'll look for them when I get bored someday.
Open Sesame - Another Romantic Comedy. Damn you Ichigo 100%!! I can't get enough of these now!! Yeah, its pretty good, fun fun. I'll check for new chapters every now and then.
Pretty Face - Guess what genre this is? Yep, another one! It fun like the rest of the kind, but I heard the ending sucks. Oh well, I'm here waiting for the scanlators to release a chapter every 2 months… Meh, I shouldn't complain.