I may not be able to complete a full list, but I'm gonna throw out a portion of what I have read/am currently reading and see if anyone can throw something new to me. I read tons of series weekly, but without something to go from scratch, I go through a weeks releases pretty quick, and wind up left with little to read.
Mangas read/currently reading:
One Piece, Fairy Tail, Bleach, Naruto, Hajime no Ippo, Gamaran, Cage of Eden, Kyou Kara Ore Wa, TAL, RRR, Silver Spoon, Player Kill, Teppu, Go Da Gun, Hanza Sky, Air Gear, Rival, Kimi no Iru Machi, Freezing, Tower of God, The World God Only Knows, Sun-Ken Rock, The Breaker(completed), The Breaker: New Waves, Last Inning, Karate Shoukoushi Kohinata Minoru, Last Inning, Bakuman, Transfer Student Storm Bringer, Trace(completed part 1, never found what followed), Beelzebub, Defense Devil(complete?), Taboo-Tattoo, Code Breaker, En Passant, Be Heun, Medaka Box, Mahou Sensei Negima!, 1/2 Prince, 666 Satan(complete), Accell World, Addicted to Curry, Aiki, Akaboshi - Ibun Suikoden(complete), Alive - The Final Evolution(completed), All Rounder Meguru, Angel Densetsu, Ao no Exorcist(Blue Excorcist), Arago, Arata Kangatari, Area no Kishi, Baki (pretty much all of it I could find), Bamboo Blade(complete), Bamboo Blade B, Basilisk(complete), BB Project, Beach Stars(complete), The! Beach Stars, Black Cat, Blazer Drive, Blood Lad, Bloody Monday(completed), Bloody Monday season 2, Bokkesan, Busou Renkin(complete), Change 123(complete), Code Geass- lelouch of the rebellion(complete), Code Geass-Shikkoku no Renya, D. Gray-man, Darker than Black(all of it), Deadman Wonderland, Death Note(completed), Dragonball(all three of course), Examurai, Eyeshield 21(complete), Fanatsista, Fate Stay/Nite(completed), Fire Fire Fire, Flags, Full Contact(complete), Full Metal Alchemist(complete), FLCL(complete), Gamble Fish, God Hand Teru, Grenadier(completed), Haruleya II BOY(completed), Hayate x Blade, hekikai no AION, Hellsing(completed), High School of the Dead, Hikaru no Go(completed), HSD Kenichi, orignal HSD Kenichi(completed), Hitokatana, Hunter X Hunter( I did stop after the anime, though), Ichigo 100%(completed), Immortal Regis(completed), Inugami(completed), parts of Inuyasha, Iris Zero, Jack Frost, Jackals, Kagijin, Kaitai Shinso Zero, Kamen Teacher(complete), Kandachime, Katana, Katekyo Hitman Reborn, Kaze no Stigma(complete), Kangoh Bancho(disappeared QQ), Kurohime, Law of Ueki(complete), Law of ueki Plus (complete), Liar Game, Liar Game Roots of A(complete), Light Wing, Lock On!(complete), Lost+Brain(completed), Loveless(completed), Luck Stealer, Magic the Gathering, Maken-Ki, MAR(complete), MAR Omega(I couldn't find all of this), Metallica Metalluca, Mirrai Nikki(complete), Mixim(complete), Needless, New PoT, Ouran High School Host Club, Ping, Psycho Buster, Psycho Staff(complete) Psyren(complete), Rappi Rangai, Remnant, Kenshin(complete), SamuraiX(complete), Saijou no Meii, Saiyuki(complete, working on other incarnates), Samurai7(complete), Samurai Champloo(complete), Samurai Deeper Kyo(complete), Samurai High School, Scryed(complete), Seto no Hanayome, Shade- The other side of Light, Sengoku armors, Shakugan no Shana, Soul Eater, Soul Eater Not!, SWOT(complete), T.R.A.P., Takkoku!, Tanei Gakuen Q(complete I believe), Tengen Toppa Gureen Legann(completed), Tenjo Tenge(complete), Teppen, Teppu, The God of High School, The Legend of Maian, Tiji-kun!(completed), both To Aru series(index and choudenjibou), Tokyo ESP, TOUGH, Tripeace, Veritas(complete), Witch hunter, Witchcraft Troops, Wolfguy- Wolfen Crest, Yakitate!! Japan(complete), YuYu Hakusho(complete), Yureka, Zero no Tsukaima, Zetsuen no Tempest, Zombie Loan(lost track of where these were released).
On and off reading: Hayate the Combat Butler, Toriko, Kenji, Until Death do us Part, Hajimete no Aku.
Going to try: DRUG-ON, Drunken King, Izaykaku, Kugutsu, Melty Blood series, Monk!
My issue is that even though above is a huge list(and I probably forgot quite a few, also), several have just disappeared, or I'm still waiting weekly/monthly for them.
I try to limit what I buy bookwise on my nook, so even if I go through and read allthe things I've half assed so far, and the new ones that caught my eye, In a month or so, I'll have nothing but weekly releases left.
You can see if you actually read all those that I'm not really picky, and there are probably a number of shoujo mana I've read and still read that probably aren't listed, so I'll take anything that's interested enough to get hooked on.