Not sure what I'd do in WoW. It's all up to my wife.
She hates PvP like Diablo 2 PvP, but when she created her WoW character, she created it on a PvP server (unknowingly) and didn't seem to have any issues with it.
Her and I will probably each buy an account and play together, but we'd have to build another system first, really. We'll see!