I've ridden in Norway/Sweden and Denmark (10yrs ago now, so YRMV), Norway was the best riding, the whole west coast is filled with twisty coastal roads around the fjords, HOWEVER speed limits are ridiculously low for much of it and its enforced enthusiastically. Being a foreigner makes not difference and large fines had to be paid on the spot !.
Lots of car shows during the summer and a healthy custom bike scene.
Weather is changeable at best, and the road surfaces eat tires. Oh its also crazy expensive to eat drink, stay or buy. Free to look at though....
Sweden was like Norway lite, same stuff but not as extreme. I did like Denmark though, the locals were friendlier and Copenhagen is a beautiful city.
All in all, not the best bike holiday I've had, but was worth a visit.