For me, form is also function. I try to follow some zen-minimalism in my workplace. Everything has to be consistent around me so that it fades away in the background so that I can concentrate solely on what is on my monitor. No colored keycaps for me for my daily driver. All black-white, including desk, mouse, mat, kb, speakers, etc. ALL
But if I had to choose, function. That's the reason I started with mech kb's in the first place: the switch, the feel. I CANNOT stand the crap rubberdomes that logitech and the lot push out nowadays.