Also, to get the thread going. What manga have you read? I know even though I've read manga since I was a teen, because most are so long, I haven't read a ton. These are the ones I can remember:
X - Super awesome emo for my teen-self. Ended on a cliffhanger in biggest troll ever
Clover, Chobits, Lawful Drug, entire library of CLAMP sexy guys shoujo - Was fun with striking art for the time.
Trigun - Great art and some cool stuff, but by the end got really shitty sci-fi.
Rurouni Kenshin - Awesome shounen fight manga for my teen-self. Pretty good overall even if it just sorta glides to the ending after the Enishi arc.
Kenshin guy's next manga - Yikes.
Hikaru no Go - Awesome sports manga! Really enjoyed this from start to finish.
Death Note - Lol, we all know Death Note at this point.
GTO - Fun, but really cheezy and hasn't aged well at all.
The GTO prequel one - I remember this being a lot more funny.
Azumanga Daioh - Speaking of funny, this was great.
Yotsubato - This was even better.
Berserk - Really good, but never ending so don't really care anymore. Every 5 years I catch up on like 2 volumes worth...maybe.
One Piece - Best adventure.
The Jump Trio - Naruto/Bleach/HxH - All were good at parts, gave up on all three years ago for various reasons.
Fushigi Yuugi - First shoujo, was manga twilight for my 16 year old emo self.
Ayashi no Ceres - Yuu Watase kick kept giving. Was entertaining,but Twilight 2.0
Monster - Book that got me hooked on Urasawa. Great thriller.
20th Century Boys - Damn good until it really, really wasn't
Pluto - Alright.
Hellstar Remina - My only Junji Ito; was goofy as fuck but entertaining and my style of planet eating fun.
Hellsing - Badass, story was ok.
Drifters - Haven't read it in a couple of years but was enjoyable pulp coming from Hellsing
Beck - Enjoyed this A LOT early on when it was about a Band (like the anime better because real music), but the 2nd half is like dumb mobster shit.
Gantz - Good pulp horror until it got really fucking terrible in the last arc.
Gundam mangas - I like Gundam so therefore they are all good enough.
Full Metal Alchemist - Was great for a lot of it, but felt it kind of fell of a generic stupid shounen manga cliff in the ending arcs.
Hmmm, might be missing a couple but I think that's basically the manga I've read. Duckroll is trying to get me to read Silver Spoon next. I dunno, farming school slice of life seems pretty boring. I also heard Bakuman's good too. Would definitely be up for recommendations.