I'm betting if we ever see the series end with a flash forward to them starting families, we'll see them with unnamed males we haven't seen before. Spike is probably going to end up getting over his crush and spending the rest of his childhood with Twilight's family. (He's going to take a while to fully mature, I bet.)
Rarity might end up with Celestia's nephew in the end, but we might have to wait for the season finale to figure out how likely that could be. He might be a total douche. Either way, I don't think Rarity would be the type that would want to become an old maid.
I can't imagine Applejack
not wanting a husband and kids of her own at some point. She seems very much a family pony, and they need a new generation to help run the farm. Caramel seems to be a friend of the family. I think he'd be the safest bet.
I can imagine Rainbow Dash would end up single at that point- partly because a lot of fans like having her sexuality stay ambiguous, partly because she doesn't seem like one for settling down- but she'd be a member of the Wonderbolts.
We'd probably see Fluttershy ending up with someone just as shy as her, and we'd be treated to x2 awkward interactions combo. Maybe a character with a comical fear of animals he'd have to get over?
Pinkie Pie? Tough call. Maybe it'd be some poor
Arthur Dent-ish pony that has trouble keeping up with her. In any case, I'd bet she'd have a hell of a bachelorette party. The wedding'd probably be nuts, too.
Oh fuck, I just wrote fan-fiction.
It doesn't seem that right to me, though. Seems like there'd be too many passive males, but on the other hand it'd be kind of obnoxious to have new characters out of nowhere with personalities large enough to overshadow the mane 6.
Hey waaaaaait. What about Braeburn and Pinkie? Might be kind of weird considering they didn't seem to have much chemistry, but it seems like the most appropriate straight pairing for her so far.
Wait, what was I thinking for Fluttershy? I completely forgot about Big Macintosh. That'd just be hilarious.
Might be kind of weird to see so many of them become part of the Apple clan.
Hmm... having a hard time thinking of someone for Twilight. It's probably be too weird if she ended up with Snips or Snails even after they grew up and hopefully became a little less stupid. I think it might be fun if it was Dr. Whoof. I'm guessing a yet unseen fellow smarty-pants unicorn would work out.
But I guess I'm kind of weird in that the only relationships I'd want to see would be ones that would make for a satisfying and plausible inclusion in the story. That doesn't seem to be the point of shipping at all.
Fuck. I need to do homework.
Ruining everything forever.