Here's my list of recommended beers:
Summer or needing some to pound down quickly for a buzz: Corona. Sure, it might be shit compared to other Mexican beers but it is awesome compared to macrobrew shit from Coors. Smooth, decent taste when cold, and doesn't give me headaches no matter how many I drink.
Seasonals: Sam Adams Summer Ale, Octoberfest, and Winterfest are generally very good.
Widely Available Beer to Enjoy: Bass Ale, on tap preferably. My favorite widely available beer.
Genres: I've taken a liking to porters and stouts lately, with Black Swan (local brewery) Robust Porter being my favorite. I do need to try Guinness again because I might like it now.
Other Favorites: Pacifico is my favorite Mexican beer. A little heavier than Corona but it has a great taste.
What to Avoid: Coors, Miller, most Bud products, Sam Adams Noble Pils (this is a "mediciney" beer)