I'm a beta though bear in mind I'm more masochist than sub. I am also very introverted and the whole alpha/beta dynamic means less with us introverts than it does with extroverts (we tend to do our own thing).

Lastly I do sometimes play the BDSM game from the top. I do recall one sub being disappointed with our sole encounter and didn't want to see me again saying that she was looking for an "alpha male".