Superboy comics based on the tv show also ran until 1992, and ironically were the first non-Archie comics I ever bought.
The Superboy comic tie-ins were actually pretty interesting. For one thing, they had Curt Swan. The "Superboy" comics was the only time I can remember that the Swanster ever drew the "crystal" Krypton of the movies. It came off as a weird hodgepodge of design elements: he had crystal architecture, but Kryptonians still dressed like they shopped at the Buck Rogers store (though with slight modernization; think Buck Rogers if done by Dave Cockrum).
Curiously enough, one plot point in SUPERBOY: THE COMIC BOOK was that young Lex Luthor hijacked the crystals of Krypton, which he intended to adapt for his own master schemes. This was many, many years before SUPERMAN RETURNS, but the similarities are pretty incredible. The comic book tie-in had a pretty nifty idea: part of the reason Lex's technology is so far in excess of what's possible, is because he had access to Kryptonian science, and with his mental adaptability, modified and applied it.
They did the right thing bringing the Flash to TV. He has a great look, and a motion-based power that looks terrific. Harlan Ellison said some characters in comics are in the wrong medium: Flash is one of them, as is Hawkman. In a comic, Hawkman just hangs there on a page. In live action, he'd look pretty awe-inspiring. The Angel was the single most visually incredible part of X-3, and it's a shame he wasn't used.
One thing I really wish the Flash TV show had done, was an effect that was often used in the Silver Age: show the Flash moving normally, but have the entire rest of the world "frozen." This is not a very exciting effect in comics, where everything is
always frozen.
And that creepy season finale cliffhanger with old school great Gorilla Grodd?
Trés Magnifique!