It's not negative. Sex drive differs from person to person, so there is no "too much" or "too little" in general.
As long as it doesn't get to be too much for you or you find yourself maybe overstimulated, I believe what you are experiencing is completely normal. You may not be that age anymore, but some things carry over as you age. Since masturbation is a pleasurable thing for you, I can understand how it would affect you and your drive.

I'm not entirely sure if you do. Haha, I think I myself have a low sex drive, but that's only because it's hard for me to become aroused.. Well.. Ever. o_o I'm not sure why. Whatever it is, it takes a long time and lots of stimulation, both physically and mentally, for me to get in the mood.

And whatever you feel is best. Take it slow and remember that if it doesn't work for you, you can always go back or try something else that you're comfortable with.