Besides MMOs I'm not a big fan of online gaming, and FFXI got real old, real fast. The emphasis was way too much on groups (which were impossible to find because Japanese people wouldn't group with Americans), the equipment system was too rigid (which made good weapons insanely expensive for the player's level) and there were too many powerlevelers.
PSO was fun for the Dreamcast, but as soon as they started expecting a monthly fee it stopped seeming so compelling. Everyone else is paying $10 a month for massive, static online worlds, and we're expected to pony up the same for what was little more than Diablo with guns?