For a few years I’ve toyed with the idea of ‘changing my name’ to Kit. I like it. It’s sparky, and seems better to fit me than Chris or Christopher. ‘Changing my name’ is in scare quotes because Kit is an accepted diminutive of ‘Christopher’, so it’s really only like a David preferring to be called Dave.
There was a point where I considered it more seriously, but there’s an arsehole Tory politician of that name and I didn’t like the association.