(I know that No. 6 isn't really considered Shounen-Ai, but to me it is.)
I only buy what I can watch more than once, so with that in mind, here's the list:
Favorite Anime. (Unordered List)
All anime i've watched so far (updated evry 4 months)
Animes I'll watch more than once. Probably enjoyed the most
This is just a little list of my favorite yuri/shoujo-ai anime. I recommened to everyone to watch these animes.