My favorite thing about running on an Arch system is I know what's going on all the time. If an Ubuntu system breaks I'm generally dealing with a mass of preinstalled things, it's hard to know what's relevant.
Similarly for increasing boot speed, I really like knowing exactly what I need to be running at any one time.
I appreciate it's not for everyone, but I imagine most coders around here who run a Linux system would benefit a lot by taking the time to set up an install and having it work how they like.