Well, the sound of the Virus is a matter of taste. I've always loved the digital kind of sound it produces. I also like the new hypersaw and wavetable oscillators but I don't care that much for the somewhat weird sounds the graintable and formant-based oscillators produce. I guess they're not for me.
It's also great to be able to use it together with the Virus Control plug-in from within my DAW. It's true that you forget that you're working with a hardware synth. I must say though that the only program I've got it working with without problems is Logic. Ableton Live (serious arp sync problems and then some...) and Metro (sorry dude...) don't seem to like it that much. I'm sure that once you get the loaner, I won't have to resort to Logic anymore...