OK, I'll bite. What specifically do you guys consider good beer?
Personally, I prefer Guinness, which costs about $1.50 US per pint to drink in my own comfortable dungeon, but might cost $4-$5 at a "reputable" drinking establishment. I tell my wife that I am saving our family $3 every time I drink one at home, but for some reason she just looks at me funny... 
Hmmm, I could say that any beer I enjoy drinking is a good beer
I like my beers with quite a bit of taste. Guinness is fine, but it is to a proper porter what Fosters is to a good lager. Perfectly quaff able, but not greatly inspiring. I know it's a controversial statement for some, but the sad fact is that there are so many good porters and stouts out there languishing in the shadows.
I'm a big fan of dark, well matured beers. The Belgians are top of the class for this, with excellent beers such as Westmale or Grimbergen. In general most of the Belgian 'Dubbel' beers are highly enjoyable, if possibly a bit intoxicating. The 'Trippel' beers are not for the feint hearted.
Another interesting group of beers is the Czech dark lagers. My current staple is Krusovice, which is readily available in many places. I think this is due to Heineken having bought the Czech brewery resently, so I fear what will happen to the quality.
(shudder)
You can also check out the German beers called 'Schwarzbier'. Very similar, and very tasty. Can't remember any brands at the moment, but there's quite a few breweries that make them.
When it comes to lagers I'm not too fuzzy. Most places have at least one passable brand on sale. I've come to realise that Scandinavia is severely suffering from inferior beer. Perhaps because I grew up with that stuff I'm still able to drink it. The special Christmas beers are a notable exception, with lots of interesting flavours running riot.
One thing that still amazes me is how the UK, birthplace if the industrial revolution and lowers of all things processed and flavourless, still have a decent tradition for some artisan products. The most notable examples are ales and cheese, both of which I greatly appreciate. Newcastle was probably one of the first 'exotic' beers I encountered during my formative years, mostly thanks to a dodgy basement bar selling it (yes Rune, you know you really love 3B!). There are too many brands or breweries to mention, but the bast part is that a lot of pubs change their ales depending on what they get from the breweries. Nothing like a bit of variation to keep it interesting.
My current favourite is
Innis & Gunn. Finally somebody over here realised that if the continental Europeans can create truly great beer, why should the British? It's a dark and very sweet ale, matured in whiskey (or rum) casks for some truly interesting flavours. Anybody who hasn't tried it yet should immediately run out and try it. Another brewery to consistently deliver good drinks is
Brew Dog.
Honourable mention goes to
Rogue Ales from Oregon. These guys (and possibly gals) have finally shown that good beer can be had from the US. I've heard there are lots of other good beer over there, so why do you keep sending us all the pish?!?
Enough ramblings from me. A bit early for a beer though.
