I'm just a long time lurker...who finally decided to get an account!
I don't feel as though I need to justify my slash leanings, but same-sex relationships, when done well, are absolutely fascinating to me and I enjoy reading different perspectives than my own.
I absolutely adore Crossovers (GW/HP, Twilight/HP, Naruto/HP, etc.) because it's wonderful to see the interactions between two wholly different worlds and the characters...makes for some great plots and stories (again, when done well)! I adore any sort of pairing, although HP/anyone is a particular favorite of mine.
Of course, my one love has to be the world created by JK Rowling...it's created a world where authors can branch out practically anywhere...I am grateful to her for giving me a wonderful way to escape when I need to...and of course, a means of procrastination!
That's about it for now...