Some years ago I got into home-brewing. Back then about the most flavorful beers (non-import) we could get in the US were like Killian's Red, or Rolling Rock. There was a nice beer out of Maryland, I forget the name, but it had a circulation of just over zero.
I actually got 2nd in the state fair one year. Today we have lots of micro-brews, and I don't have the time for home-brewing. But I have always loved a good balance flavor best - not too much hops, like an IPA, not too much malt, like many porters, stouts, and "brown ales". My favorite is a British type of ale, with medium body and a good hop sharpness to balance the body and sweetness of the malt.
I keep coming back to Long Trail Ale as my preferred brand of this type of beer. Long Trail also produces some other very fine brews - their brewmaster, like me, believes in a balance of flavors. Adirondack is another brewery that does a good job with this. Adirondack offers a wide variety of brews, quite a few of which are flavored. I rarely care for flavoring in beer. It can be nice, but I prefer a HINT of flavor that adds to complexity and balance, and most brewmasters like to slug you in the face with the flavoring. So you won't find the latest blueberry/coffee/chocolate beer offering in my home. Adirondack goes slightly over the "hint" line, but they still do a good job.
I will tell you one beer, though, that has flavoring and is more than excellent - Dogfish Head's Chicory Porter. They don't produce it all the time, but if you happen to see some, you have my recommendation to try it! They have an excellent balance of chicory's coffee-like bitterness to counter the basic maltiness of a porter. A superb beer.