If I had to guess, I'd say Virgo, Taurus and Capricorn would be the most likely. But, any sign can be a Dom or sub. Depends on a lot more than the simply sign. There is always a moon sign to consider. Many more factors creep in there as well. I don't totally 'believe' in astrology, but I do enjoy it as a fun hobby.

But, for your records... I'm a Capricorn sub, with a Capricorn as my moon sign as well. Figure that one out. lol