I absolutely adore my children, but my one-words aren't necessarily complimentary.

I like HeyDad's "Willful" for DS7

For DS10 I'd either say "amazing" or "freak" (mostly in a good way) depending on the situation

For DS12 I'd say "Insightful", "Creative", or "Lazy"--again depending on the situation

For DS14 I'd say either "Egocentric" or "Soulmate"