For many of us, the command line is where essentially all our work takes place. As such, choosing the right terminal emulator is important. In the past, I used OS X default terminal (Terminal.app) near exclusively. At some point I tried iTerm, but it just didn't feel right. For the last few months, I've been using GNOME Terminal at work. However, it's missing some features, such as terminal activity/inactivity notifications in tabs. So then I read about Terminator (not the one for which there is a wikipedia page but this one). I have to say that the horizontal/vertical split options it supports are terrific, and no way I ever use a terminal emulator that does not support this feature again. Terminator also does auto logging, which is pretty great when 6 months from now you wonder how that one-liner went. So what is it for you and why? Konsole? Some emulator in EMACS? xterm? There are so many to choose from. Bonus question, what color theme you go for? For me it's always the general green on black..