Genshiken: A fairly simple story concept which gets executed with surprisingly deep results. This is a tale of a loosely-run club of otakus, and of the trials and tribulations of the various members. Although none of the plots of the show is entirely original, the characters and the fact that they suffer through realistic otaku problems (combined with the fact that most readers are probably otaku) make it a very fun, and occasionally emotional, manga.

Characters: You have Sasahara (freshman), the introverted guy who opens up as he gets to know the rest of the club members. Kohsaka (also a freshman), who is the hardest of the hardcore in otakudom, but who looks like a normal guy. Madarame, a guy who wears otaku pride on his sleeve, has trouble dealing with ordinary emotions when he feels them (personally, I see his story as the most heart-wrenching). Saki, a non-otaku, stuggles to realte to her otaku boyfriend. Ogiue, a disgruntled artist, deals with her conflicting emotions towards otakudom (is one, but hates others). Other cast members are well developed, making the group dynamic very believable.

Art: Fairly expressive, and very cute (in a non-moe way). The first reason why I loved this manga was the twist on the classic "blood vessel pop" that Shimoku uses especially with female characters.

Story: The plot tracks various members of the club through their four years of development as otaku and humans. The overall premises aren't spectacular, but are enough to carry the group dynamic along.

Overall: A very nice, relaxed, funny, and heartful manga. Definitely worth a look.