As cliche as it is to say, I use Arch!
Started down the Linux road in the mid 90's. First distro I remember using was redhat (came with a book), and then switched to debian for years. I've tried Ubuntu at home, but always switch back to something lighter and settled in with Arch the last few years.
Most used apps are: X/bspwm (no bar), urxvt, vim, and firefox.