Hehehehe, cervezas, you of all people ought to like beer! I mean, with that nick...
I like many different beers. When I was in Spain, I was pleasantly surprised by some good beers they got - Cruzcampo, Alhambra or Mahou, for example. San Miguel is one of the few beers the rest of which I gladly emptied into a park after tasting one mouthful. Some obscure, brownish North-West American (Seattle Area) beer was equally awful, about at the same level like Chinese Ginseng beer. Yes, that exists.
I like the taste of Desperados, that Mexican beer, but unfortunately I get a headache from it no matter how little I drink. I like many Pilsners, too, but I'm afraid I'm not much into most dark beers, except for some nice bitters I drank in England and of course Kilkenny, which can be nice once in a while as well.
But I keep coming back to what I grew up with, our very special beer which is only brewed here in Cologne - Kölsch. There are more than 20 private breweries in the area of Cologne, and all of them make Kölsch. For people used to Pilsner or stronger beers it tastes weak at first, and Bavarians, who are used to drinking beer from 1l "buckets" often make fun of the small, thin glasses (0,2l - they kinda look like test tubes if you're used to fat tankards). But it's a great party beer, and nothing feels as good as one nice cool Kölsch after a longer time of drinking other beers. Not that I wouldn't enjoy other beers, but it just feels like your tongue is coming home...9_9
Concenring Dutch beer, I really don't understand why Heineken made it all around the world... I'd prefer Grolsch all the way, and not only because of the fancy "plop-action" bottles. But when we spent our holidays in the Netherlands and regularly plundered the nearest supermarket's Grolsch supply, we had a friend coming with a crate of Kölsch... all I say is "heaven".
Oh, and in Granada, Spain, there was a nice little private brewery where they made very yummy beer, and they emphasized that they made it according to the German law of beer purity, which has been in vigor since 1516(!) and survived every trouble in history and every change of governments, be they monarchies, republics, dictatorships or democracies. It has made sure that there's no unnecessary junk in our beer for nearly 500 years, and I hope it will live to its 1,000th year as well - Hail Beer! *burps*
-EDIT-
@ MarD: I do believe it's spelled "Kilkenny" (with one "l" only...) - "killkenny" is South Park.