I suppose it doesn't matter at this point, like most other things. I enjoy my username. it is short and sweet. I also decided to keep my avatar and signature the same forever as it is more recognizable. Again, not sure it matters, but whatever.
I will keep mine as well, plus my awesome avatar, which will be eternally associated with Santa Sangre, even when I will be gone and forgotten from the face of this earth.
What I dislike more is the frequent change of sigs and avatars by some members. There's always work with these putting them into AdBlocker just in order to load the forum pages more effectively.