Fun topic! <S>
Hehe I believe it's "Jonny" Quest, actually

Saw the first episode, the first NIGHT (that's right, it was on at night) it was on. '64 or '65 I think.
How bout...
Fireball XL5
Thunderbirds (are Go!)
Spaaaaaace Ghoooooost
Fantastic Four (the Silver Surfer was definitely the coolest cartoon character ever)...
Roger Ramjet and Speed Racer (hated those two, watched em anyway...)
UFO and Space 1999
Watched 12 O'clock High a buncha times, and "Combat" (With Vic....(kaboom!) Morrow and Rick....(kaboom!) Jason!)
Was there a cooler ship than the original Romulan Warbird with its BFG(its Captain was cooler too...)? OK, the Flying Sub was pretty cool too...

Man From U.N.C.L.E. was on too late for me to watch it! But (yuck!) GIRL from UNCLE was on earlier (big whoop!)
When I think of what my old G.I. Joes would be worth now if I had kept 'em

(Four words: SEA SLED, and MERCURY CAPSULE, baby)

But as Ice notes, that was a different time, when an 11-year-old would give his whole collection of GI Joes he'd "grown out of" to a little boy whose dad was killed in Vietnam, while his own dad was still fighting there, and then feel happy he'd done it...
You can't go back home again, I guess, but thanks for reminding me. I smiled a lot reading this