As a racket user I wouldn't say racket is a good scripting language unless you use racket/base and manually require the extra cruft. Startup is quite darn noticeable even on my relatively fast ssd-equipped laptop. For small scripts the startup time is often by far the largest part of the total run time.
As a scripting language the startup is a pain (It has been getting much needed attention just this past month and they are seeing a big improvement on that)
In terms of having a soft spot for lisp and clojure I find that Racket is the best thing ever for scratching that itch. I really am excited by clojure for scripting though.
But yeah, racket is fun.