It was never really a fandom of mine, but I guess I've hung out in the right corners of fandom to osmose Seishirou/Subaru. I would never have gotten 2, though I've heard of the fandom. I would have gotten 3, but been mad about it. 4 was the one I instantly recognized, because that was my fandom before Guardian ate my head (though I never wrote in it). 5 took me a minute, though I was heavy into that fandom around twenty years ago.

It looks like nobody's guessed 6 right, so my guess is Hardison/Parker from Leverage.

I really enjoyed Onmyouji, but I only saw it once over a decade ago. I was trying to get an Untamed pairing out of 7. ;-)