If im at a pub black velvet (half guiness, half strongbow cider) or half and half (half guiness, half harps)
If i want a great tasting beer at home either newcastle brown ale, bass ale, or even red stripe (love the bottles)
If im at sports bar either alexanders keith ale, labatt ice, blue, or ex or the occasianl sleeman cream ale or honey brown (never canadian...tastes like crap)
If you want the smoothest beer try Kilkinney...goes down like nothing and tastes great.
Stay away from bud, corona, coors light, old milwakke - tastes like water aka monkey piss