Everything is subjective... but I hate when GI is too bright. My go to bulb is CT ww frosted for a natural look. Same for backbox but I won't fill that up or it gets too bright.
I have a boatload of cw that I'll probably never use since I switched to ww. Game pics in my profile if you want to see my preference.
For older games I'll also try to put in an LED-patched eprom and turn dimming off in the settings.