Physt,
Yeah there are quite a few B3d users over there currently. I can only tell you that in my eyes Unity 3D is a game engine and as such is where others like Torque should be - but isn't.
B3d is a language and so you have to code everything yourself, which gives you great control, but it can be slower to develop than something which handles all the loading of ojects and scripts and sounds automatically for you, and provides extra built in features which just work out of the box. B3d does not offer the same sort of extras (built in) which Unity does, such as shadows, shaders, physics, particles, GUI, Input control, and the list goes on. Having said that the price differential makes up for that somewhat.
B3d = DX7
Unity = DX9.0c and OpenGL
B3d = Windows only
Unity = Windows, Apple Mac, plus in browser web deployment, Wii, iPhone
The BIG BAD for some is that it's currently only available for development on an Apple Mac. Windows version is coming soon I understand. But you can deploy to Windows in the Pro version.
Unity a very friendly system with a pretty nifty visual editor for designing the layout of your games and objects is as simple as drag and drop. Anything you have in your scene is automatically loaded for you when you use Application.LoadLevel("Scene1"); Unity has given me the expansion and control I want, with shaders and stuff, plus C# and JavaScript scripting, plus Wii and iPhone when I'm ready (which will be any week now btw).
HOWEVER - I also love B3d and it has earned pretty well for my company over the years and indeed will probably still do so when necessary in the future. I have Mark Sibly to thanks for that - Thanks! :)
As an example, last year I completed a 12 month game kisok project which kept me very busy all year and I have completed two prestigious interactive projects this year alone in B3d for two of my clients, one is in place at Chelsea Football museum and the other is in the Royal Institute, London.
So I have nothing but respect and admiration for B3d. I'm just adding to my toolkit with Unity in order to be able to offer more next generation style interactives, iPhone and maybe later Wii stuff - we'll see.
The iPhone announcement for those who don't yet know:
http://unity3d.com/unity/features/iphone-publishingIPete2.