I second what have been said by both scarlet_85 and denuseri!

As for the dominant streak, if you have always felt it in you, I believe that it should make things "easier" for you to take on a dominant role with your spouse. If you think about what comes to your mind and what may trigger it, then it might help you research what you might be interested in, and of course what was said about communication with your wife is utterly important. I think that discussing what everyone enjoys only helps making things better and even discover a whole new lot of things.