Grrr vcxzet, this discussion is pointless
The gamma settings you play with depends on your hardware, the light in the room at the moment you re playing, the map, and your personal preference.
Hardware : On my laptop i cant play with 1.0, its just way too dark but its not the case for every PC. I started Tremulous on my laptop and when my desktop was back from repairs i tried Tremulous on it, and found, with great surprise, that i could play with it without modifying default gamma.
Light in the room : obviously when your room is dark you need less brightness
The map : some maps are darker than others
Personal preference : some people set their brightness to max because they think they will spot the lil dretches easier. As for me i find this useless and very ugly (with gamma set to max, details tends to disappear).
So, pls vcxzet, stop pretending you know the perfect gamma setting and every other player who doesnt use it is just dumb