Newcastle Brown is my first choice at most places, and from the grocery store I shop at. I even adopted Newcastle United as my football (soccer) team due to the beer! I was pissed when they put ntl: as their sponsor on their kits. I need to order the 1999 blue away kit before Subside runs out.

I prefer porters and stouts after that, as I haven't found another ale that tastes as good to me.
Guinness, Watney's Cream Stout, Imperial (I think it was called this) and McGuire's (local pub here in town) for stouts. Oh, Sam Adams cream stout isn't bad.
Porters - the McGuire's is good, I also like Sierra Nevada (and have some in my fridge next to the newcastle right now). Anchor Steam Porter is good too.
Only lager I really care for is Red Stripe. I haven't tried any of the Asians, tho I hear they're good (Sapporo sp?, TsingTao, and one other that starts with an A i think.)
Can't remember the name, but there's a fantastic Polish pilsner I've had... Nice place in town has 100's of imports and microbrews. Their motto is no crap on tap, meaning only Bud you're getting is out of a bottle (if they have iced any down that is!)
Interesting beers.. Samichlaus!!! (sp?) Swiss beer they only made once a year (dec 6yh), then barrel it for 3 years! Sadly, this beer has been discontinued. I only had it once, a 1994 vintage (funny to say that about a beer!) in 1997 or 1998. I'm glad I kept the empty bottle. Maybe they'll bring it back one day...
La fin du monde - Canadian beer. cloudy and strong (9% alc/vol). Fantastic beer!
Humpback Honey Wheat - Microbrew I had once back in mid 90's. I haven't seen it around these parts since. Think it was made in Minnesota, but not sure. Anyone else know of this micro?
McGuire's Root Beer - it ain't real beer, but it's the best root beer I've ever had! I order this more than their stout and porter combined!
Ghost, I want some of that Newcastle like stout. That sounds damned interesting!
oh, worst beer I've ever had. Apollo. It's in some blue bottle, and boy, it SUCKED!