Make a list of all the characters in your icons. (Although you may have more than one icon of a single character, they only go on the list once.) Alphabetize it. Take the first two people on the list; that's your first pairing. Second two people; second pairing. Etc. Then write your reaction to each pairing (or a snippet of a hypothetical fic featuring each pairing).
Akito[fruits basket]/Arashi[paradise kiss]
POOR Arashi. Akito would not be taking any of his bullshit that's for sure.
Byakuya[bleach]/Cameron[house]
They would have really pretty hair. And Cameron would bitch at everything and there would be interesting ethical debates.
Chase/Fuu
AWWWW. He would be all nice guy, and she would take so much advantage of him. But in a cute way.
Gin/Hakkai
Shit. That would be so mindfucky and awesome. Gin would be creepy. And so would Hakkai, but in a really cheerful and even creepier way.
Hitsuyaga/House
O-M-G. The images. They burn.
Miwako/Neji
I want to write this! That's too much cute. They'd get all into fashion together, but Neji would be quiet and amnly about it. And he'd do EVERYTHING for her and get all protective and sexy.
Tenten/Riza
That would be way too much hot. Seriously, the screen would explode from the sheer badassery. They get into tons of weapon conversations. It would be cute.
Roy/Shigure
DOOOOO WANNNNNTTTTT. Seriously. Someone could make them both so fucked up and sexy and dirty and omg, I want this fic.
<3