tmux was pretty much required for any work. I would use irc, w3m for internet browsing, mutt for email, and vim for programming.
I thought if I only used the terminal I would become very good at it, kind of true but I have never had the ability to use linux at work yet. I learned a lot more by breaking and fixing X once I got a machine faster than an RPI model A.
I don't recommend doing this, it was not worth it.
[0] http://www.terminally-incoherent.com/blog/2007/05/21/a-day-w...
As in most of the time the window focus is on a terminal? Yes.
In my computer, 90% of the time there are only 2 types of windows open. 1 is the web browser, and the other is the terminal. Sometimes I open up Emacs to read my mail or write some notes in org-mode, but my text editor of choice is vim in a terminal, not even gvim.
I grew up on MS-DOS, so it was not really such a long stretch, to work this way.