Scheme worth it?

Essentially what the subject says

Is it worth it?

I can see the idea behind the concept of homoiconicity, but really, wouldn't it be a waste of time for a seasoned programmer to learn to use it?

I tried to watch the MIT lectures, but they were godawfully boring

just out of curiousity, what is Racket? Its just a flavor of Scheme that has features added to make teaching easier? If you set the language to R6RS in DrScheme/Racket then you get vanilla Scheme right?