Mine is The Dreaming Spires by dementordelta. I like it because parts of it read like non-magic AU which I adore but there is also magic. I like both what Harry does in his pursuit of Snape and what Snape has done to require being pursued. :D (Trying not to give too much away on the CRAZY off chance someone hasn't read it. *g*) I like that Harry is very much a mature, grown man but still very Harry. So, yeah, I never ever get tired of re-reading this one.