Sylas managed to combine two things that i never thought would be a unique concept..
Having fun and playing to win. I always made the two thing separate, when i wanted to win, i'd play jungle, my main role. When i wanted to just have fun i'd play support, or top. Sylas managed to made me have fun while playing jungle, it's so fun when u're like ganking a veigar, steal his ult, jump on him and kill him with his own ult, or dive a botlane after stealing an Alistar's ult and tanking the tower for a decade without them expecting it. Every game u can do something different, for the first time i'm queueing up as jungle because i want to and not because i have to.