I played around with Quest, but felt that Windows was the better place for a quake editor. Those are all very nice editors. I think I looked at an early version of QuMa and some others. I'm a patent, copyright and trademark lawyer. I've had a few inquiries from other game companies based on BSP, which has been cool.
Life is good.
I think Reg. Quake is the last new game I purchased. I'm really into the technology aspect of how it was programmed. I studied the qbsp, vis and light source code, it's pretty informative stuff. Duke Nukem 3D was pretty entertaining.