I started reading Hot Gimmick about a year ago when I found the first volume sitting in a pile of friend's library books. I got up to volume 8 before life got busy and I lost track of it.
I recently started reading again, and I've gotten up to volume 10 (I can't find volumes 11 and 12 online! D=)
I guess I just wanted to say that I really enjoy the story and the irrationality of the characters really strikes me as true to life.
I'm a RyoukiXHatsumi fan, in case you're wondering. =)