Beveridge Place Pub in West Seattle and Naked City in North Seattle are my beer bars of choice. Beveridge does a lot of great brewer's nights, cask nights, and they have an "iron brewer" competition with local brewers. Pretty awesome.
Wow. There are so many. You'll get over welmed asking a question like this one. It really depends in which part of Seattle your at. I live near renton so I head over to A Terrible Bueaty. Yep They got the beer plus the atmosphere. Check them out when you get a chance.
Brouwer's in Fremont is defiantly my favorite! 60 beers on tap, a great Scotch selection and the food is pretty ggod too. Also I like the whiskey bar on 2nd Ave., if you like whiskey you will love their selection.
Brouwer's is such a great, warm retreat from the weather. I love the food (I had a cheesy roasted endive thing that was so good). I'm not nuts about Belgian or malt-forward beers, but their selection is broad enough to please even a hophead like me.