I love Yuri but I don't read it much, for the few Yuri and Shoujo Ai that I read, if I really really like them, I'll put them on this list. When it comes to Yuri I actually prefer really adorable shit, and dislike rape and BDSM to be honest. Though there's probably some dark ones I do like.
I'll bet this list will contain mostly cute stuff, and be lacking in twisted stuff.
