It's hard to explain my relationship with Emacs, but starting it is the first thing I do when I turn on my computer.
I don't use it much for development these days, but I always have a bunch of buffers open and I do a lot of residual work on it.
If I install Linux on my computer, the first thing I always do is install Emacs, it's like a kind of default environment for doing everything text related, and it feels incredibly unfamiliar not to have it open all the time.