I don't really read/write that much threesome stuff, really, but I'm totally up for it if I like the pairing or characters involved. I've been kind of interested in Jack/Gwen/Ianto. I think that can be such a cool dynamic to play with.

I put "Whatever" (and the tentacle answer, too), because the genders of the characters involved aren't that big a deal to me. However, I do kind of like M/M/F and F/F/M. I just think, personally, that part of the fun of a threesome is that you can mix and match, if you will.