I prefer grey lenses. Grey is much more color-neutral than are green, brown, amber, etc. (which is why photographic neutral density filters are grey, and not some other color), and I like keeping color shift to a minimum.
Of course, some people may believe that the color distortion is beneficial, and can provide valuable contrast in certain conditions, which explains some of the popularity of amber sunglass lenses, particularly for driving. (Yellow/amber was traditionally used as a filter color in black and white photography, to enhance the contrast between blue sky - which it darkened - and clouds. It was a bit more realistic than the even more exaggerated contrast provided by a #25 red filter.)
But in any case, choose lens color based primarily on the optical properties you're after. Not on whether you (probably mistakenly) believe a certain color will make you look more relaxed, or playful, or more like a really hoopy frood who knows where his towel is.
As for mirrored lenses, they'll make you look like a 1970's motorcycle cop, which most people wouldn't deem a plus, but maybe you hang out with fans of the tv show CHiPs. Unless you have a specific need for the advantages of mirrored lenses, I'd say they're best avoided.