I believe each one of us has multiple aspects to themselves. Should I use a different nickname/name in order to hit a specific aspect I want to change (for ex: a lover using a specific nickname and wanting to change that aspect of my personality)?

No, there is no need. Any name will go to the deepest layers of the subconscious thanks to our profound subliminal technology and affect all aspects, and help change and evolve you into any direction you want, for the better.