I'll echo Tom here: go ahead and scratch the itch. Like much of life, exploring our sexuality is how we can learn more about ourselves. Trying to force yourself to being one thing or the other might just be against your grain. Or you can find out that you get the most out of holding the whip. You'll never know until you try it.

That being said, I also think it is important for Dominants to experience some, if not all, of the things that they ask their subs to do. Kneeling, for instance. If you haven't tried it, you have no idea just how hard it can be to kneel for long periods on hard surfaces. The same for being tied into different positions--if you do it, you know the limitations of the human body and can take better care of your partner. And, if nothing else, you can use the time you are restrained to come up with some fun activities and/or scenarios for when you get loose.

Have fun. Be safe.