I found the Winter Lager pretty so-so. I have some Boston Ale in the fridge that I just can't seem to finish off; I found that it's a little too sweet for my tastes.
One that I would like to try, but haven't yet, is Sam's Imperial Pilsner... but what can I say, the guys at Sam's make pretty decent beer when put into perspective. My favorite is the old standby, Boston Lager. The best thing about it is that you can find it anywhere!