As a long time NeXTSTEP user I hate even calling it Mac OS X. I like to think of it more as Openstep 5.0 or maybe 6.0 since that bad Rhapsody port was in there for a bit. I really didn't switch to using primarily Apple machines until the switch to OS X but it was mainly because I had loved NeXTSTEP so much.
I bet you all can guess what other "retro" hardware I horde. Dismal market failure but I really enjoyed using them. The Web was first imagined on one so that's got to count for something.
I am really interested in the details of what makes people feel restricted when they use Mac OS X. I have never felt that way but I can imagine others do just interested.