Well I support my hometown team Tromsø, they have never won the Norwegian league, not that this surprises me. They didn't allow teams from the northern part of the country into the top division until 1972.
Best they ever did was come 2nd in the league. They have played in Europe a few times. Now they have a plastic pitch, which is shit, natural grass is the way to go, can't teach skills on that shit, but they don't have the cash to have proper undersoil heating and the like.
Gamst Pedersen, Tore Andre Flo, Rushfeldt and Steinar Nilsen who was our coach until recently some of the best players to play there.
Got all the weather conditions, wind, rain, sun, mud, slush and snow, but it was a good atmosphere the one town team and also had many regional fans.
Best wins were beating Chelsea at home in the snow 3-2, and Gullit crying like a baby, though getting pumped 7-1 in the away leg, Nilsen scored the best goal. Then the second one was taking out Galatasary in the UEFA Cup 2-1 over 2 legs.