Thanks for the great answers, looks like theres a few here to interest me.
Zoku Natsume Yuujinchou, Bakemonogatari and REC seem to be just what im looking for so i'll be sure to check them out.
Kurozuka and Haibane Renmei also look ok if I run out of things to watch.
I've seen Tsukihime....it was ok, nothing special
and I think I will pass on Loveless and Kino's Journey (but thanks for the suggestion anyway)