I've grown fond of 3xR, actually, over the rest of the Pilotx Relena pairings. 1xR is still number one in my heart, but next comes 3xR. As for Hilde and Duo...they're interesting. You can argue that Hilde and Duo will go together for life or they're just friends. PErsonally, as much as I love 2xH, it's fun seeing Duo with someone other than Hilde (be they OC or not) and Hilde with someone else (for some reason I like her with Wufei... or with Trowa).
One couple I can't really see (canon-wise) is Dorothy/ Quatre. I like them together, yes, but I can't really see them as a canon couple. The only reason, I think, they're paired together is because Quatre really doesn't have a femal counterpart in the show. SO (yes, there's an alt. pairing mention in this) I grew to like 4xR.
Though, I think ultimately, they'll just end up as friends. They're too similar in my tastes. Sometimes, if Quatre or Relena is written differently, I can definitely see it (example: Her Wicked Ways, by Andrea).
As for the OC thing.. I said in the beginning that everyone has the potential to end up with someone else. Written well, I think a pilotxOC pairing can be believable. As I said, who finds their soulmate at 15-16-17? I love the canon couples--really I do--but it is refreshing to see new characters in there every so often..
IF the OCs don't end up Mary Sues/ Gary Stus, then I'm sure I'd like the fic (example: Andrea and zapenstap's work). Plus, it gives you a character that you can manipulate to your liking--there's no OOC for an OC to begin with so I have fun with that. Being mainly an original fiction writer, I take that idea and run with it.
So... this is my two bits on this.
