I have always hated for anyone to shorten my name. It sounds like a mafia goon's name to me. The one time my mom tried to call me the shortened version, I reminded her she didn't name me THAT (omg Mom, ugh)!
She did have a few odd nicknames for me (and my siblings) - Ivan Stravinsky Stravorsky (or something like that). I never minded the nicknames, though. Just the shortened name.
