(Wow. It's been a while since I've posted here...)
Last time I was here, I had only read the Alice 19th series. But now I'm totally up-to-date with several others. 3nodding
I don't know who my exact favorite couple is, but the ones I like...
CERES: Celestial Legend
Aya + Toya (sorry LHL and NI, but I think Toya's neat sweatdrop )
Ceres + Mikagi
Yuhi + Chidori (I wish it could have gone farther cry )
Fushigi Yugi: The Mysterious Play
Miaka + Tamahome/Taka
Yui + Nakago (never mind that it wasn't real, it added interesting plot structure)
Yui + Tetsuya (much better)
Hotohori + Nuriko (I wish! blaugh )
Alice 19th
Alice + Kyo
Mayura + Frey (just a what-if)
Imadoki! Nowadays
Tanpopo + Koki
Tsuki + Aoi (aka "Flippy") (I kinda paired them up early on in the story, because of the conflict between each other, but I didn't think it'd actually happen! blaugh Boy, I was pleased.)
Yoji + Erika (Okay, did I just go through all the couples in this series...?? sweatdrop )