Interesting replies, but almost predictable. Chartreuse has a real strong following and actually chartreuse is at least a strong component in many of my pet colors as a tail color.
It would have been fun to narrow this question down even more and specify which species to go along with color choice.
Fun stuff to hear what others see as their favorite color or go-to. I remember back in the mid-70’s I got a deal on some bulk Mister Twister 1″ and 2″ twister tails in chartreuse. I bought 3000 of each size. I still have a mess of those nasty, color bleeding, critters. For a while they were my favorite color too, lol.