I'm interested to hear how you switchers cope with the basic annoying broken stuff on the Mac. Things like the fact that you can't resize windows on any edge/corner, the random behaviour of the maximise button in many apps or disappointing keyboard support in apps (even with the extra support turned on in the OS).
I didn't use MacOS much before getting Linux working on my Macintosh, but I found its oddities oddly fun in a sort of "steampunk" way. It felt a bit like visiting an alternate reality where RiscOS 3 won the OS war against Windows 95 (oh, and got a process model).
Peter