I would have to say probably Leinies Big Butt Doppelbock made me get away from just drinking Miller lite and the like. Then New Glarus' Spotted Cow really got me trying different beers. Then I joined Old Chicago's World Beer Tour and have tried hundreds of beers. Lots of them bad but a few of them good. Bells Two Hearted was the turning point that I really started liking hoppy beers.