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).

Unlimited scrollback, the ability to copy and paste using the keyboard, key bindings to clear scrollback, change font size, etc., separate keybindings to scroll the buffer vs. send scrolling commands to the terminal, double-click on parens/etc. selects a range from there to the corresponding other one, and I could probably go on listing more-or-less unmatched _usability_ features for quite a long time. On the other hand, if it's functionality people are referring to then I guess I just don't know what I'm missing because I've never found it lacking in that department either.

As the cultists say, it "just works".