Wow, I don't have it as bad as you, but my GMail account still gets at least 15 spam messages a day. Google's spam filter seems to work pretty well, and the majority end up in the junk folder. They primarily consist of offers to buy erectile dysfunction drugs online, followed by incoherent strings of meaningless text.
What's annoying, though, is I keep the account as private as possible. I only give the address to individual people I actually know- I've never signed up for anything with it or used it any other way.