Earlier quoted context omitted.
One more thing: A terminal as a first class citizen. Definitely not on Windows, and while the OSX one is orders of magnitude better, I seem to recall it's still a bit lacking. What ruins OSX for me isn't the terminal, though, it's that X apps aren't first class.
Regarding the Terminal - I never really got what people meant when they said the terminal was lacking. Maybe it's lacking some obscure features, but it absolutely nails the core features. The OSX terminal is, in my opinion, the single best terminal I've ever used (and I split my time fairly equally between OSX and Linux as my main desktop OSes and have tried pretty much every Linux terminal app I can get my hands on)…
Well, the Mac terminal used to suck (especially before Leopard) so maybe people are talking about it pre (Leopard|Snow Leopard|Lion)? All the last three releases greatly improved Terminala.pp so it is in many ways superior to the Linux terminals I have used.