Earworm: ALL the songs. You can hear the main theme here.
Narm Charm: Yes, the show had a minuscule budget to rival Clutch Cargo's cheapness. However, given that the stories are largely adapted from the original stories as is with art by masters like Jack Kirby, the series captured the wild energy of the Silver Age Marvel comics as a prescient forerunner of Motion Comics.
Super powered from the forehead to the toes! / Watch 'em change their very shape before your nose!
WheeeenCaptain Americathrows his mighty shiiiieeeld / all those who chose to oppose his shield must YIIIEEELD... / When he's led to a fight and a duel is due / Then the red and the white and the blue'll come through...
Doc Bruce Banner, belted by gamma rays / Turned into the Hulk. Ain't he unglamo-rays?