I have and dropped it fairly early because I lost interest. But fair enough, I suppose it depends on the definition of "vanilla"
I don't judge by fetish unless it's some super sick stuff but my statement was going off the assumption most people define a vanilla relationship as missionary only with no other sexual endeavors. BDSM overreaches that criteria but I understand the notion of vanilla BDSM very well. Trust me, I want to be stepped on and hey if that is considered vanilla I'm game.