I agree with the reasoning. However, more from a hacker's point of view, wouldn't you rather hide the implementation details of your email system you use behind

I agree with the reasoning. However, more from a hacker's point of view, wouldn't you rather hide the implementation details of your email system you use behind something that you know will stand the test of time? For example, if gmail were to no longer be the preferred email address system of techies (because they start charging, they are no longer reliable, or as seen more recently, you get totally locked out with no way of getting real support, etc), you would have to struggle with letting the word out about your new email address, or something. With your own email address, you would have the flexibility to switch out to a different mail provider with your domain's MX records. You also can print business cards without worrying about reprints and the like. :) Anyway, I don't necessarily think bigger customers will think you're bigger just because you own a @stormpulse.com email address.