[QUOTE=silenus]
Short answer: probably not.
Longer answer: It depends on the beer and how you store it. Since you said you are now drinking for flavor, I’m going to assume that the beer you are buying isn’t** BudMillerCoors**. As long as you store your beer in a cool, dark place before it goes into the fridge, you shouldn’t have any problems.
On “taste”: Beer tastes best if it is served at the same temperature it was brewed at. That means ales get served in the 50s, lagers in the 40s, and American megabrews not at all.
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Emphasis mine.
First point of advice, ignore anyone who passes off these brainless memes. You are talking to a close-minded beer snob who spends inordinate amounts of time bucking convention and feels validated by having the most obscure beer label in his or her hand for the sense of superiority it brings.
In truth, many small microbreweries make occasionally bad, and frequently inconsistent beers. It is true that they usually are more adventurous in their concoctions, but adventurous and good have never been synonyms. Of course many microbreweries make outstanding beer as well, but it important to understand that uncommon doesn’t always mean good, expensive doesn’t always mean good and mass marketed doesn’t always mean bad.
Additionally, imported beers should always been looked upon with the utmost suspicion. Beer snobs forever love to cite their “tradition” and high quality. This is another example of blatant label-slurping. Beer is quite simply a food product. As a result the concern above all else is freshness. Imported beers by their nature are going to be older beers. This doesn’t always mean they are undrinkable, but it certainly makes them a riskier proposition. Additionally they are required by US law to be pasteurized which essentially cooks those beers. For most people that alone should be a huge red-flag. Martini Enfield’s generalization that each countries “national” import is a fair one. Stella Artois for example is one of the worst beers in the world, in Belguim it’s considered their “wife beater beer” much like Busch and MGD are here.
Now, mass-market American light beers are generally going to fall into that category of “bad beer” that snobs love to pigeonhole them into, and that’s largely by their “light” nature. However to assume that this applies to the “American lager” style as a whole is foolish. American lager as a style is a very difficult style to perfect. That is the primary reason why it’s almost unheard of for a microbrewery to successfully make one. The lightly hopped, well carbonated profile makes it nearly impossible to hide off flavors and inconsistencies in the process. Budwesier’s most redeeming quality is that they are uncommonly good at making a consistent product using all natural ingredients. Additionally their commitment to fresh beer is also one which should be respected by beer drinkers. I take cryptic code dating to be a major warning sign. Miller produces consistent beer as well, though they are known for using chemicals and additives to achieve this.
All that said, everyone is welcome to their preferences. Do not assume that American style lagers are bad simply because they are ubiquitous. Try them and compare them to others and find your preference. If you enjoy Corona, it is similar in style to most American beers.
Another issue I have with beer-snobbery is it’s tendency to mutate into hop-mania. Most of the beer geeks on the SDMB and almost certainly those on Beer Advocate cannot convince themselves to enjoy and promote a beer that does not have an IBU (International Bittering Units) of over 40. Dogfish Head brewery mentioned above is most famous for their 60 minute IPA and 90 minute IPA, each with and 60 and 90 IBU rating respectively. They are good beers, however they fall into a category of “extreme beers”. They simply are not for everyone, and most likely they are not a variety I suspect a converted Corona drinker to take to initially. Unfortunately many supposed beer snobs will scoff at anyone who does not share their addiction to extreme hoppiness. I compare it to the “chile-head” fad in which the extreme heat of ultra hot franken-sauces is the only acceptable preference.
One more word of caution, local brewpub beer isn’t always that fresh. As noted above, freshness is a important consideration, so one would imagine that beer brewed on-sire would be the epitome of freshness. This simply isn’t always true. Good brewpubs will gladly promote when various batches of beer were barreled and the staff should know when each variety was brewed and packaged, but you need to understand that most brewpubs make several, if not dozens, of styles of beer. They are usually limited to a couple of fermentors and can only brew one or two styles at a time. As a result they must produce enough of each style at a time to last them until the next scheduled brewing. For certain specialty styles who’s appeal is limited that could mean a variation of many many months. So while it may have been brewed on-site, it could have been brewed before Xmas. Long story short, ask questions when you have educated servers available to you.
Now more directly to the OP’s question, the answer is yes…sort of. Warming and cooling of beer is generally a bad thing, however the effect is more pronounced on different brands and different styles.
First a little info on the way beer is distributed. Bottle beer, which is typically pasteurized, is going to be fairly shelf stable. Most brewers do not refrigerate bottle packages from the brewery to the distributor, then from the distributor to the bar or store. They are kept in generally cool and dark environments at as close to a consistent temperature as is reasonable. You should use that as the guideline for handling it once it gets to you. In a grocery store or liquor store, the beer that is warm in the aisles has probably never been chilled. If you don’t intend to drink the beer immediately you should probably be buying that. It’s better to keep room temperature at room temperature instead of buying cold beer only to have it warm up in your pantry. If you are going to be drinking beer in short order or taking it directly to your fridge, buy the beer from the cooler section.
Generally speaking that applies to all beers, but certain styles are designed to be more durable and to be handled at warmer temperatures. IPAs and other high-alcohol content beers are going be more shelf stable than a golden lager. As a result you can be a little less cautious in your handling of them. In fact most are intended to be enjoyed at closer to cellar temperature.
Of perhaps greater concern than variations in temperature is exposure to light. Moving beers from fridge to shelf can create opportunity for exposure to light if you’re taking it out of the cardboard package. When dealing with American style lagers and a wide range of European pilsners this is a major issue. Beers in clear or green bottles should be treated with extreme care. Also, darker beer just by their color tend to stand up to light better simply because the interior of the fluid isn’t exposed to as much light.
You should always take care in keeping your beer at home, but as a general rule you shouldn’t be buying more beer than you plan on consuming. Remember, it’s a food product and you should only buy as much as you intend to drink before your next shopping trip. If that’s going to be the case, the risk of mishandled beer is minimal.