I was playing through GW1 again just a couple months back. Great game, great character build variety. Plus the hand-drawn vistas still make you stop in your tracks all these years later.
GW2, on the other hand, well… I played through it on a couple characters when it originally launched, but in the end it ended up boring me. The diminished character building was a big factor. Nevertheless, I have a friend who still plays religiously; when asked if he'd rather play GW1, his typical response is, "I can jump in GW2." …Yeah, different priorities I guess.