I know an Erika, and she's really nice. The name's okay, I wouldn't name my child that... I'd like something with more meaning than a feminine Eric.Monica is okay too. It brings to mind someone kind of mean though. I guess I like Erica better.
That's the only thing that makes the name Erica slightly interesting to me. But mostly it just makes me think of the 1980s and EricaKane from "All My Children". :-/ BTW, there were twins named Erica and Heather on the old Degrassi tv show.