I took this from cercenightshade
The Dark Night
I don't see any similarities except I have a thing for blonds with brunettes and I also enjoy pairing someone masculine with someone delicate and pretty but that's not always the case with every pairing.
I also have a thing for bad boys they set me on fire still LOL!
Edit:You're also not opposed to turning canon animosity into sexual tension: Harry/ Draco, Batman/ Joker, Lestat/ Louis. That is such a turn on for me :)