I had a friend that did the same thing. Her name was
Jennifer, and she continually switched between
Jen,
Jennie, and
Jenny, and would actually get upset with me if I used the wrong one. So I eventually made up my own, I'd call her Jenna-six, or Jenna-three, or sometimes just Jenna-four, rediculous, I know, but fun! :)
I think I like the nn
Vince the best, but I would probably write it Vinny.
Vinnie looks to feminine to me and reminds me of
Winnie.