Coloured distinctive menubar icon
I deeply wish the simple setting for a coloured menubar icon, one that's distinctive. I can't blame you completely, but f.lux icon in the menubar looks, viewing in a split second, pretty much at the icon of TimeMachine and, in my case, also 1Password. I've got multiple icons on that bar and I sometimes really get angry clicking the wrong icon over and over. This also happens the other way, clicking on F.lux, instead of TimeMachine though.
But I would simply really wish a distinctive icon/color. Perhaps using the F.lux icon colours (orange/blue) or just changing the icon to the colour of the time (blue at daylight, orangey at the evening). At least make it an option. Wouldn't be too hard, would it?