Hmmm... I'd have to say that my favourite quests would be Desert Treasure, Recipe For Disaster, Swan Song, Garden of Tranquility, Forgettable Tale..., and My Arm's Big Adventure. The first three because they were long and had good boss fights, and the last three because they had funny cutscenes. I'm surprised at how much some quests have changed over the years though, especially the f2p ones, as I did all the f2p quests except Dragon Slayer back in the days of RSC. When I do some of them again on my pure they're actually quite different. (The storylines are the same, they just have different graphics and some of them now have cut scenes.)