I prefer the vibrate on the TB over the D1. With the D1 the whole phone shook when it vibrated, causing it to fall off whatever you put it on if there was a slight downward slope. It also made a lot more noise, the TB is perfect because when I have it on my desk at work only I can tell when it vibrates.
I agree with the vibrate when it is sitting on my desk. I'm on a client site today, and the vibrate is perfect. Its not too loud nor does it jump everywhere.
I guess what I am looking for are different settings for the vibrate. Lets say, a work setting and a going out setting.
I took out my TB this weekend and in a loud place with my phone in my pocket. I could barley feel anything if I did feel it vibrate.