If I were single I would definately not choose a vanilla relationship. I would be seeking out a D/s relationship and would not settle for just the play aspect of it either.
I also don't think that this lifestyle would run my life so much that I would find someone who could fulfill my needs, but their personality would be a problem. I don't think a relationship could survive that way anyhow.
If I was looking for a long term relationship, even if I shared a fondness for this lifestyle with someone else, I must also be able to live and grow with them. I would rather wait for someone who is compatible to me than just settle for whatever comes along at the time.