Oh gosh.. about 15 years back my hubby brought home some farm fresh, not white eggs. And I was scared to touch them, never tasted a single one!Their cloaca!
If all chickens in the same flock eat the same diet, their eggs will all taste exactly the same regardless of the shell color.
Shell color is breed specific, taste and yolk color is dependent on diet.
I always get the question when people see some of my dark eggs - "What do they taste like?" I say they taste just like the white ones from my own birds.
ETA
A variety of shell colors certainly do make for a pretty egg basket or egg carton.

Are you kidding me?! Now I can't believe how COOL it is to get a white egg, which I don't currently have. But WOW, can it ever really set off the colors in the egg basket/carton and become a wonderful part of the display!
