These are the series of which I have seen or read some. I may vaguely intend on watching or reading the rest of them someday, or I may be in the process of doing so right now.

Read some Rating
3x3 Eyes (manga)
A Channel (manga) Good
Acchi Kocchi (manga)
AiON (manga)
Ano Hi Mita Hana no Namae o Boku-tachi wa Mada Shiranai (manga)
Aria (manga)
Assassination Classroom (manga)
Attack on Titan (manga)
Beauty Pop (manga)
Berserk (manga)
Blue Exorcist (manga) Good
Cafe Detective Club (manga)
Chitose Get You!! (manga)
Citrus (manga)
(The) Comic Artist and His Assistants (manga) Good
Fujoshi Rumi: Mousou Shoujo Otaku Kei (manga)
Fullmetal Alchemist (manga)
Future Diary (manga)
Gekka Bijin (manga)
Gurren Lagann (manga)
Hells Angels (manga)
Higurashi no Naku Koroni (manga)
I Don't Like You At All, Big Brother!! (manga) Weak
Iris Zero (manga) Very good
Jauhara Genya (manga)
Joshiraku (manga)
Kanamemo (manga)
Kiss×sis (manga)
Koi to Senkyo to Chocolate (manga)
Kuroko no Basuke (manga) Good
Love Lab (manga by K. Momoyuki)
Lucky Star (manga by K Yoshimizu)
Manabi Straight! (manga)
(The) Melancholy of Haruhi Suzumiya (manga) Good
(The) Melancholy of Haruhi Suzumiya (light novel) Very good
(The) Melancholy of Suzumiya Haruhi-chan (manga)
Minami-ke (manga)
Missions of Love (manga)
Mysterious Girlfriend X (manga) Good
Nana to Kaoru (manga) Good
Naruto (manga) Decent
Nichijō (manga)
No Bra (manga)
No Matter How I Look at It, It's You Guys' Fault I'm Not Popular! (manga)
Onii-chan Control (manga)
Pokémon Adventures (manga) Good
Puchimas! -Petit Idolm@ster- (manga)
Reset (manga)
Rock Lee no Seishun Full-Power Ninden (manga)
(The) Rose of Versailles (manga)
Saikin, Imōto no Yōsu ga Chotto Okashiin Da Ga. (manga)
Sailor Moon (manga)
Sankarea: Undying Love (manga)
School Rumble (manga)
Shiba Inuko-san (manga)
Shoulder-a-Coffin Kuro (manga)
Sketchbook (manga)
Slam Dunk (manga)
Sofuteni (manga)
Soul Eater Not! (manga)
Strike Witches: Maidens in the Sky (manga)
Tonari no Seki-kun (manga)
Toriko (manga by Shimabukuro)
Uzumaki (manga) Good
(The) World is Mine (manga)
Yubisaki Milk Tea (manga)
Yumekuri (manga)
Yuruyuri (manga) Good
Zero's Familiar (light novel)

I tend to rate rather positively, but try to rate fairly.

Read all Rating Comment
Abenobashi: Magical Shopping Arcade (manga) Very good
Alice no 100° CC (manga) Bad
Alien Nine (manga) Very good
Alien Nine Emulators (manga) Decent
Angel Cup (manhwa) Good
Azumanga Daioh (manga) Excellent A genuinely hilarious and well-written manga with great characters. Convincing cuteness and heartwarming moments.
Bamboo Blade (manga) Very good
BAOH (manga) Decent
Baron: The Cat Returns (manga) Very good
Blood+ Kowloon Nights (manga) Decent
Cardcaptor Sakura (manga) Excellent
Claudine...! (manga) Good Impressive in many ways - art, thematic content and detail - but with the fatal flaw of being way too short and rushed. Wonderful characterisation and good story are unable to be expressed, though their presence is remarkable.
Concerto (manga) Good
Cowa! (manga) Good
Cutey Honey (manga) Decent
Date A Live (manga) Weak
Death Note (manga) Very good A deep series with a strong but not entirely consistent sense of originality and intelligence. Excellent characters and technical, high-quality artwork - minus some early inconsistencies and shortcuts.
Devil May Cry 3 (manga) Decent
Dragon Ball (manga) Good Series' heart and quality concentrated on earlier parts of story. Later arcs harm product with repetitiveness, reliance on deus ex machina, and loss of a sense of fun and spirit.
Elfen Lied (manga) Good
Fate/Zero (light novel) Excellent
Figure 17 (manga) Decent
FLCL (manga) Very good
(The) Flowers of Evil (manga) Good
A Girl Who Runs Through Time (manga) Very good
Girlfriends (manga) Very good
Girls und Panzer: Little Army (manga) Decent
Gokujō Drops (manga) Good
Gorgeous Irene (manga) Decent
Gunslinger Girl (manga) Excellent
Hanjuku-Joshi (manga) Very good
Hotarubi no Mori e (manga) Excellent
Iinari! Aibration (manga) Weak
(The) Journey of Shuna (manga) Excellent
K-ON! (manga) Decent A decent series with okay humour and effective characters. Tells too often, rather than showing.
K-ON! College (manga) Not really good Disappointingly inferior to the original manga, its antics feel meaningless and its setting in a college is meaningless. Humour is weaker than the series, characters irritatingly exactly the same.
K-ON! High School (manga) So-so Wastes considerable potential offered by having the lazy transplanting of the best-written character into new situations with no change. Other than that, much the same as its original incarnation but slightly weaker.
Kashimashi ~Girl Meets Girl~ (manga) Good
King of Thorn (manga) Very good A high-tension survival horror with rough art and clichéd but strong characters.
Kisses, Sighs, and Cherry Blossom Pink (manga) Good
Koikaze (manga) Very good
Kyo no Gononi (manga) Good
Magical Girl Lyrical Nanoha A's (manga) Good
Magical Girl Lyrical Nanoha Movie 1st The Comics (manga) Good Lacking totally in subtlety, but entertaining and an effective character study of the cast of the film to which it is a companion piece. Excellent artwork and action sequences.
Magical Girl Lyrical Nanoha StrikerS (manga) Decent
Mai-Chan's Daily Life (manga) So-so It offends more so in its low quality than its subject matter. The incongruity of Mai-chan's happy-go-lucky demeanour and the ludicrously horrific nature of her situation is bizarre and harms reader immersion. That said, Mai-chan's Daily Life is hardy boring.
Medaka Box (manga) Good
Metropolis (manga) Very good
Mimi o Sumaseba (manga) Very good
Miyori no Mori (manga) Very good
Miyuki-chan in Wonderland (manga) So-so The various, largely brief situations that comprise the manga play out as nothing more than clichés, lacking humour, impact or erotic appeal.
Mon Seul (manga) Decent
Mr. Arashi's Amazing Freak Show (manga) Very good
Neon Genesis Evangelion (manga) Good
Nymphet (manga by K Watashiya) Very good
Octave (manga) Excellent
Onanie Master Kurosawa (manga) Excellent
Oyasumi Punpun (manga) Masterpiece
Puella Magi Madoka Magica (manga) Very good
Punctures (manga) Very good
Rozen Maiden (manga) So-so Good characters and artwork let down by a vague, meandering plot and a lousy ending.
Sand Land (manga) Good
Shiroi Heya no Futari (manga) Very good
Shōjo Sect (manga) Decent
Sisterism (manga) Not really good
Solanin (manga) Excellent
Soul Eater (manga) Good
Stargazing Dog (manga) Excellent
Strawberry Shake Sweet (manga) Decent
Tengen Toppa Gurren Lagann: Guren Gakuenhen (manga) Decent
Toki o Kakeru Shōjo: Tokikake (manga) Good
Toradora! (light novel) Very good
A Transparent Orange in the Lip (manga) So-so
Ultra-Gash Inferno (manga) Good
Undercurrent (manga) Excellent
Velveteen & Mandala (manga) Very good
What a wonderful world! (manga) Very good
Yu-Gi-Oh! (manga) Decent

Will not finish Rating Comment
Baka to Test to Shōkanjū (light novel) Bad Terrible characters, worse humour and some of the worst dramatic tension ever put to paper. Utterly charmless. Plot is meh.