I knew an Amanda who had gone by Mandy as a child and was still called Mandy by her family, but everyone else called her Amanda. I'm not getting the Mandy hate, just as I don't get the Vicky hate. I think Mandy is a cute nickname.
Mandy is adorable. I like it better than Amanda.Vicky reminds me of the stepmother in "Parent Trap," vapid and calculating. The women named Victoria that I know either used Tori as a nickname or just used the full thing.