I need quests. I don't like grinding, Bounty Hunter, Castle Wars, grinding, Stealing Creation, Barrows or PvP. But training for and completing quests really keeps me going in Runescape. I was happy the day While Guthix Sleeps came out, because that meant I had a new challenge to go for. I'm also not looking forward to the day I get 99 Slayer (in about...5 years), because the fun with achieving new Slayer-levels is almost as entertaining as quests.