Well, I appreciate both. On one computer, I have Caps Lock mapped as Alt Gr (which I hold down to activate a 2nd layer or my Poker which allows me to move the mouse pointer and do clicks). But I make Caps Lock operable by pushing both shifts: setxkbmap -option shift:both_capslock It's true I don't use it THAT much, in regular typing, but I do when I'm programming since lots of programs have constants written in caps.
Anyway, most of the time I'm on Kinesis Advantage keyboards so the regular Caps Lock doesn't seem much like prime real estate, because the primest real estate is the thumb keys! That's where Control, Alt, Enter, Backspace and even Tab live.