Beer is for people ages 16-26, not a day older.
Progression would be:
16 years old - Cheap light beer at premium prices from the guy down the street
18 years old - Cheap Ice beer ar premium prices from someones older brother and the occasional malt liquor and MD2020.
20 years old - Cheap light beer at cheap prices from a friend who is 21
22 years old - Medium quality regular beer (bud heavy) Plus begin trying different beers
24 years old - Range of medium-high quality beers as you've really started to visit local bars/pubs
26 years old - Craft beers, making money, out of school... but still throw down some B-heavies with your bro's at Brothers/Gaswerks.
27 years old - Whiskey (with ICE), you are a man now.
29 years old - Whiskey with no Ice, hair on chest. owns a fleshlight, LS460, and a 240sx.... okay, a little close to home now....