My first call as a novice was KB2KKX. Absolute hell to get anyone to write it down correctly when checking into a net (they couldn't read their own writing when reading back a net report because the X's looked like K's and vice versa) so I changed my call when I got the Technician upgrade in '90.
I would consider a vanity call, but too many people already know me as N2LCJ, so why screw with it