Did you play it on PC?
The problem with the PS3 version was it had no online play. They'll surely add it for 2009. It was good fun playing 2 players, but it was damn boring against the computer, online is a must.
It's still too arcadey for my liking, the fact that you can never make unforced errors as well is annoying. I suppose it's aimed at the more casual tennis fan, Top Spin is for the serious tennis fans.
I didn't like Top Spin. There's no depth to it. Once you've got to grip with the controls, there's no real depth.
I have VT3 for the 360, mate. I agree with you about the lack of UEs. That's a downside. It is pretty arcadey, but it has loads of depth. The offline mode isn't very good.