I wish I could play Virtual On it looks interesting.
If you're willing to get a Xbox 360, Virtual-ON Oratorio Tangram v5.66 is the one to try out. Admittedly, this is actually the first Virtual-ON game I ever played (well sort of; Z.O.E 2nd Runner has a Versus Mode that plays sorta like Virtual-ON back when I think about it), took a while for to understand the controls but I grew to like it. Temjin, Fei-Yen Kn, Angelan, and Specineff are my favorites.
It is also on the Dreamcast but it's older version of the game (v5.45 IIRC) but its still realy good. The first game is also on XBLA/PSN but Sega screwed us over and released it only in Japan. However, there are ways around this to buy the game from each systems' respective Japanese stores.