One game that I think I'd like to do in Java is a Final Fantasy Tactics clone that does online play.
yeah, the original
FF Tactics was GOD, but I also loved
FF VII and
Vagrat Story.
Btw. Did you you know that FF Tactics Advance is multiplayer (though not online)? To be honest this game was the reason I bought a GBA.
Beside these Squaresoft games, I still love the
Monkey Island Quadrilogy and I must confess I recently started playing these
Pokemon games and I really like them

.
However, I enjoy playing mmost with at least 3 other in one room on a projected display or big screen. The Mario games (Super Smash Melee Bros., Smah Football, Mario Kart, Tennis, Golf, Party, ..) are sooo much fun, but the karaoke games on the PS2 are great either. Btw. are these available in the U.S. too abd how are they called? SingStar In Germany/UK..
Well, there is also another brand available at Nintendo devices (GBA + GameCube today) called Fire Emblem, which should be similiar to FF Tactics. I guess I'll give the upcoming
Wii sequel a try, since it very likely to have online play...
.. I missed so much, like MGS, .. but I'll talking about these in a playing habbits thread not when asked for a fav. game ;-)