The reason why I love Jon so much is because of his individuality. His tricks are the most perfect in the world. He doesnt flail one bit, he goes huge, and he always wears the sickest gear. This guy is all about style and nothing else. When  people were throwing switch cork 10s at the first JOI he was doing switch cork 5 truckdrivers (best trick ever done imo) with the best and most unique style out there.
How many skiers can grab true nose with their knees tucked up like that? Only Jon. everyone else does it prison style, which I personally don't dig.
Who cares if he doesnt do rails; rails arent his thing. I don't give two shits about rails personally, and  obviously Jon likes to go big and smooth, and you can't do that with rails. Face it, they are just smaller.
Jon kills powder, he kills the race course, and he kills freestyle. How many skiers in the world are THAT good at all 3?
Plus back in the day when everyone was doing cork 7 iron crosses, jon was doing switch cork 9s with some faaaat tail grabs and going twice as big as everyone else, and he was a teenager, whereas everyone else was older than him.
Best 10? maybe not, but he's still a better skier than any jibber in the world and none of you can even reasonably doubt that.