Sammamish, WA (a suburb of Redmond, near Seattle)
8/10
Pros: mild climate, good economy, fantastic library system (I can watch just about any movie for free), great education system (though things may have changed since I got out of public school), no regular natural disasters, near the home of both Microsoft and NOA, no state income tax, liberal state (pro if you're a liberal)
Cons: poor public transportation, very high sales tax, we might have a catastrophic earthquake in the next century, liberal state (con if you're a conservative)
EDIT: I mistakenly claimed that Washington had no property tax. I meant to say income tax.