I've never cared for it. To look at it, it reminds me of vagina autmotically (sorry!), even though the pronuncations are totally different. I know a woman named Regina who goes by Gina, which I think is cute. Gina suits her much better, too.
nn ReggieI don't love the nn Reggie but it's not horrible. There's a show called "Dead Like Me" with sisters named Regina nn Reggie and Georgia nn George.