I'm a gigantic fan of Kugane.x.Fai. They're so ridiculous that it works. And going off of that note, I prefer the Sakura.x.Syaoran of CCS rather than Tsubasa. Tsubasa was great, don't get me wrong, but I just prefer the innocence of the CCS coupling. They're cuter that way.
I have a lot more but I'll just give one more, P.Tutu/Ahiru.x.Fakir. Uh, ballet, yes. Fakir, yes, and the two are so ridiculous together that it works.
I have a thing for antagonistic couples. XD