Loveless v.1 surprised me with its complexities and the dark characters, and I made the effort to follow the series (and see some anime) rather than coasting on review freebies. Volumes 2 and 3 introduce some more typical anime aspects (some clueless females, some unfounded use of the word "love") but remains compelling through Soubi's deep manipulation of Ritsuka, clever use of word magic and a few calculated scraps of info about the organizations behind all this. I could write a huge essay on the use of "love" as a shackle rather than as freedom, because of Loveless. (but I don't have time to, don't worry.)
Loveless vol. 2 and vol. 3 are both available from Right Stuf, Intl., an online retailer specializing in anime and manga.