This actually raises a slightly terrifying reality. How much would someone have to pay you to never again recover your gMail account? I would demand just an absurd payout to willingly walk away right now, with all those contacts, messages, unread e-mails, organization, etc... Scary how much faith we put in this free service.
The most painful thing is to change your e-mail in the services where you used it for sign up. The data export doesn't look hard: http://arstechnica.com/information-technology/2013/12/google...
I (almost [1]) never use my actual Gmail address.
[1] The only time I use it is for Google services (i.e. Adsense) that require a Gmail account.