Me too Dan. Go figure. I'm a 'spacesuit' kinda guy.
As to fine Heinlein juveniles

Red Planet tops my list
Have Spacesuit Will Travel (his last juvenile?)
Farmer in the Sky
Starman Jones
Time for the Stars
Citizen of the Galaxy
Tunnel in the Sky
Space Cadet

A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.