Brony: If I somehow found my way into Equestria and found out the ponies were toy size, I'd be a little sad. I'd rather they be four feet tall (I think that's the general fan guesstimate, right?), so that I could hug them.
Ace: Kissing can be non-romantic. Or were you referring to my statement about being affectionate? And yea, given the species incompatibility, I think romance is probably unlikely to work. That said, it's possible to attain a platonic friendship that's kind of on that same level of love.
And yea, if a pony found her way here, I think it would really depend on her prior knowledge. I mean, actors and actresses get toys and whatnot of their likeness made all the time, so if the pony knew she was from a show, that would probably soften things a lot. If not, well, I'm pretty sure she'd be creeped out, even by my modest collection. In other words, Pinkie would probably go "Yay, you really love us!" and the others would give me a strange stare.