For a newbie, you are certainly getting adventurous. As far as switching being common place, from my experience, it is rare in the pro scene. Very few clients have asked me over the years. When they have, it has been tickling and spanking. Strange how those niches seem to have more of an element for switching. I've switched for a few tickling sessions because it was just silly fun and didn't feel like being dominated. As for personal relationships, the men in my life have never suggested they were into that. But, my guess would be that it is probably fairly common with personal partners. Maybe your girlfriend has zero interest in it. Maybe she is waiting for you to take the reigns. Time will tell. Sounds like you are having fun, in any case.