Oh finally, a thread involving pairings that I can actually take part in!
Let's see, my favorite pairings that no one seems to talk about are...
-Chrom/Grima!MU (Female): Since for once a girl isn't on the submissive side of a relationship.
-Gangrel/Emmeryn: Nothing defines love like someone jumping off a cliff for you.
-Marth/Lyssa: I haven't gone very far in Awakening, but I can tell from what interactions they've had that they'll make a great couple. ; ]