My grandfather wanted to call everyone and everything by a name that ended in "y" or "ie". My parents named me and my sisters so that he wouldn't be able to: Kevin, Lauren, and Michele. So the whole concept was something I was alienated from at birth. When we decided to name our Cairn Terrier Pippin, my grandfather responded by asking, "Well, what're ya gonna call 'im, Pippie?"
Because of this, I'll typically disregard nick names ending in "y" or "ie". This actually got me in a fight once because the guy didn't like being called Reginald. I'd rather say James than Jimmy, Vincent than Vinnie, Viktor than Vik, Zacharius or Zachariah rather than Zach. The exception is Jerry, because I don't like the name Gerald.