That Guy reporting in. If you stop time, the effects of your own aging must stop as well, unless you are running independently from the rest of the universe on your own completely separate timeline which includes unavoidable aging at a rate non-related to everything else (which may not be possible even in theory, as there is nothing relative to it for it to progress by)
Even Thatter Guy reporting in.
If you stop time, for your surroundings AND yourself, then how will you be able to affect anything? Time stops for you. You won't be able to move. You won't be able to think. You won't be able to start time back up again.
If I were to be a true stickler.... if we assume that time only stops for your surroundings, how would you even be able to move? If time stops for your surroundings, that means the surrounding air would also stop, and in order for you to move through space that's occupied by a gas, that gas would have to be non-time locked. It takes
time for the air surrounding you to move out of your way whenever you move. It takes
time for the air surrounding you to enter and exit your lungs whenever you breath.
Moreover, how would you even be able to see? Sight is a product of photons hitting the back of your eye, with a series of complicated electrochemical processes interpreting the different frequencies as colors, shades, and objects. In order for photons to hit the back of your eye,
time has to pass.
Whenever you used your power, you'd essentially be blind, deaf, unable to move, and would suffocate unless you immediately shut it off.