A young friend is looking for a job. When I asked for her email address so I could send some information or refer potential employers to her she said "callmescrooge@" and then the server name.
She's a wonderful person and when I asked about the email address she said, "In my last job I had to be Scrooge a lot of the time. It seemed to fit."
Needless to say, I suggested she immediately get a new email address for her job search; she did, and it's a simple, easy to remember address.
Perception is reality. In today's world, if you have a less-than-positive email address or lots of tattoos or outrageous fashion sense a lot of folks will quickly put you in a slot that says, "Not interested."
And you can argue all you want that they are making assumptions, but the reality is...well...the reality.
Now, if you don't care what most people think and the only people who support you, love you, pay you and tuck you in at night are people who look/sound/feel/act like you then don't worry about the other people's (around 80-90%) perceptions.
But, if you are going to be out here with the rest of us...or, you think there's a remote chance you'll be venturing out into civilization, you'd better at least be aware of how you appear to us and how we make decisions.