I love the blue color for the me-mover and am curious how many people picked each of the available colors in the kickstarter buy. Has that data been posted anywhere yet?
Anyway I see the me-mover as something of a luxury item that we buy because it’s appealing, so I think the more colors and color-related accessories you can offer the better. The two I can imagine off-hand are colored wheel hubs, and perhaps some kind of easy-swap bar grips.
I know none of that is free to develop, but colors are fun and I think that gives such investments a decent chance of paying off.