I have had the GamerTag MisguidedSumo since xbox live was available, and I have never been tempted to change it. I have always felt that it was a fine label that fit most of my gameplay.
My current goal is to achieve 50% completion and do I need to spend some hours popping a few hundred.
But that is just a personal target, I will achieve it when it comes. I pick up games I played and replay them. I think it’s funny when stats show 5 years between achievement earned dates, but hey, slow and steady wins the race.