Being in Disciples of the Mix (and its descendants, Do A Barrel Roll and Savage Seduction) was by far some of the best times of gaming I've ever had. Hands down. As Equinox stated, I met people through that guild that I still talk to today, and, as nerdy as this sounds, without that experience I'd lead a much lonelier online life.
Guild Wars was, and still is in a lot of ways, a fantastic game. I've logged well over 3000 hours since its inception, and I don't regret a moment of it--though I will attribute a vast amount of that enjoyment to the people I played with. Equinox, Origami, Dead Hex, D-Lux, Azul, Brycepops, irriadin, T-Stock, and a whole shitload of other people who are an absolute blast to play with--whether having Origami yell at us for sucking in the middle of a GvG, going out and traipsing across the Southern Shiverpeaks as a guild to cap Feast of Corruption, hanging out on Ventrilo calling each other fags and just generally shooting the shit, or the eventual addition of the IRC channel #roll--all of these I look upon quite fondly.
Granted, if you're playing solely by yourself, it's not going to be as fun--that's just how multiplayer games are. And by this time, the 'OCR guild' itself is long dead, of course. But GW2 is on the horizon, and I know I'll be diving in headfirst--perhaps at that point, we can rouse up interest here once again.