I myself used to be addicted to Guild Wars. I bought all the expansions, cleared through the maps multiple times and somehow logged over 4000 hours of gameplay into the game. I then quit for a little, returned to the game, redid it all with a new character. Then I moved to the PreSearing aspect of the game where I sent over 2000 hours creating characters and death leveling them till level 20 for the LDoA title.
I got GW2 as well. I decided to play it from a beginner's perspective and did not link my GW account with my GW2 account. I must say, it's not the same. It didn't catch my eye as much as GW1 did but I'm sure it just takes some taking used to.