+1. I have a personal email address of the form <first initial><second initial><lastname>@gmail.com and I get tonnes of misdirected mail from Sarahs, Samanthas, Sams and Sebastians. And that's with a second initial! I'm very close to moving my personal email to a vanity domain, for this reason alone. (It's also a bit smelly to rely on another company for your unique identifier.)