At work I use ACAD 2005
they keep making it worse with each release. I've started using AC3D at home for my stuff. Something I do miss though is the ability to import Global Tiff's into a drawing. I don't need to just insert the tiff in the background; but actually have it in the right place globally. This is something I'm wanting to try to learn how to do and write a plugin for; but I also wanted to see if anyone else had worked with it or could use it. At work, we create the terrain outline with the tiff (ship simulator).
Gary