Favorite Backdrop for Professional Portraits?

[BlackDog's]

I’m just wondering what everyone’s favorite backdrop to use for professional portraits would be? Natural outdoor scenic views? Solid color, black or white muslin or canvas? What color? Scenic muslin or canvas? Paper? Digital? Something else? Where did you buy?

Thanks!

 

[Digital Matt]

It depends on the person, their clothing, the concept, and the end use of the photo.

 

[WolfSpring]

Are the digital green screen backdrops anygood? I saw one of those in a catalouge and thought it'd be easier then changing out so many backdrops.