I did once play Maple Story and Bots, but those games were lacking in replay value, so I promtly stopped playing them a week after I downloaded them.
Even now, once again, Phantasy Star Online: Blue Burst is getting repetitive, so I may end up deleting that as well, soon.
The game I'd love to see online (coop or not) is the Kingdom Hearts series, too bad that will never happen in any lifetime. -_-