I have a couple of questions to ask:
1: What does the term "vanilla" have to do with BDSM?
2: As far as switches go, who enjoys it more?
1) some people decry vanilla as bland, boring, or generic. Personally, I find it to be a nearly perfect foundation upon which to build exactly the sexual sundae that I want.
2) as the priests at delphi once warned travellers - "This, above all things: to thine own self be true." That means that whomever enjoys it more really depends on who is doing what to whom and whether they enjoy it. It's a little too subjective to make any sort of blanket statement.
I'm pretty strongly a bottom, but that actually makes it sexier when I'm on top. I enjoy being the one in control, the one holding the whip and tying the knots, but at the same time, I can look down at my partner and knew exactly what they're experiencing, because I've been there. I've always kind of felt sorry for the folks who don't try the other side of the coin now and again, because they honestly don't know what they're missing.
Think of my verbosity as a sort of litmus test for our relationship. I write in a manner identical to how I speak and how I think. If you can not cope with what I have written here, it is probably for the best if we go our separate ways.