I'm late to this discussion but I'd say I am firmly in the "poly" camp. Variety is the spice of life and there are so many intriguing Dommes advertising on the web that I would find it very difficult to limit myself to just one.

There is also the question of travel and location. My ability to session with pros depends on travel and I often find myself in a different city for one reason or another.

The excitement and feeling of anticipation when you are about to session with a Domme for the first time is huge for me. The initial contact, discussing potential activities, levels of intensity, play style and gear that might be used all add tremendously to the experience. Sure, I'm occasionally underwhelmed or disappointed but that's all part of the process.

Having said that there are several Dommes I have sessioned with multiple times in the past so I'm definitely not "one and done" either.