just because royalty had a different feel than most other films of that time (i'll take your word for it, i wasn't quite started puberty at that time) doesn't make it the best ski film ever made at all.
obviously all other companies copied that style of movie and now it's everywhere and has been changed around (improved?) in lots of ways.
wicked was a great movie, without a doubt. seeing different butters was really cool, as was the variety of styles that were there. although unrelated, they used seventeen before frosted flakes was even thought of. sweet.
the teaser had a great feel that, like royalty, swayed away from the regular boring poor boyz hawt flick of the month. but i found the film itself to kind of miss the feel sas had going for them in their teaser, which was a let down.
therefore, i'd say that as of yet there is no best ski film of all time.