How does one choose a quality beer that tastes good?

I went to the grocery store tonight and looked at all the different beers they had to choose from. I'm not talking about the general beers that most know of. I am referring to the high quality beers from all different parts of the world. It was very difficult for me to decide on one beer out of all the different ones. It's sort of like choosing a fine wine I suppose. What are the main differences between gourmet beers to look for? I like the less thick, lighter, sweeter beers, not the heavy stout bitter ones. Does anyone have any reccommendations on how to choose a good beer? Tonight I took a gamble and went with Heavy Seas' "Winter Storm" ale. It's a bit strong for my tastes, but it has a nice kick. Any help would be appreciated.