Nostalgia
I really liked runescape, now I just hate it.
Got up to lvl 98 then got hacked so ragequit, that was back in 3rd grade. It looks like a lot have things have changed since then but nothing will ever make me play the game again.
I think I got hacked because someone saw that I was trading 2mil for some epic armor.
I am actually suprised at how easily I gave up runescape after that. I didn't even bother trying to get my account back because I knew that my whole free time was revolving around that stupid game. All I did was pick flax - go to spinning wheel - spin flax - deposit in bank - repeat.
If I learnt anything from runescape its that the majority of people online (confined just to runescape) are little kids with no moral values, weird adults who should get off their ass and find a job, or people who want your account.