I don't have a favorite, and that's my problem.
I have this condition where I need to have one of every color that I can. Thankfully, I am not aware of all the possible muscovy colors yet (hard to find info on the web about their colors and genetics), but if I ever buy Storeys Guide to Ducks... My condition will probably flare and I'll order hatching eggs or buy more birds. DARN!
I have solid whites, color crested whites (white with patch of color on head), blue pieds, lilac pieds, chocolate pieds, solid blacks, solid blues, solid chocolates, lilac barred/pied, chocolate barred/pied, blue barred/pied, blue fawn/lilac/fawn barred (not sure what color she is, waiting for her to moult out her old feathers)...
I also just hatched out my first silvers that I"ll be keeping on 8/26, out of a Blue/Blue breeding. I have three, and they seem to vary in darkness of the pattern at this age (still down)... so I'm not sure if there is variation in color with Silvers. Guess we'll find out!
I'd REALLY love a black barred solid, and a chocolate barred solid. I guess I'll just have to make more next spring, and keep more breeders.
My main breeder drake, sired all ducklings born here this year. He's a blue pied.
Lilac barred pied hen, chocolate barred pied hen, blue barred pied drake
Silver duckling
near-solid black drake
lilac hen