I dislike gamma. Gamma settings on desktop computers are hard to set up on almost everytime. In games you sometimes only need to press escape and then click 1 to 2 times to set it up, on Macs you need to recalibrate your whole display. If you are lucky you can set it up in your GPU driver on Windows, but it's not guaranteed to stick after updoots of either the driver or Windows. In Linux you have to hope you don't break Xorg when you enter some obscure terminal command.