I didn't follow comics at all as a kid-- I was more about
Mad and (shudder)
Cracked. I think the first run I collected was the Marvel adaptation of
The Empire Strikes Back. Still, whenever I was visiting relatives I seemed to get cheap comics thrown my way as a sort of generic 'kid' thing. One book made an impression, and strong enough that I hunted down a copy some thirty years later:
Superboy and the Legion of Super-Heroes #233.
My original was missing the cover, so this was my first impression of it:

...it goes a ways towards explaining a minor sneaker fetish, I think.
Also memorable was the splash page introducing the villain-- a perfect expression of the lasting influence of both Jack Kirby and Steve Ditko:

Laser babies, man. Frickin'
laser babies.
This book is rare in that it exists almost exactly the way I remembered it, down to the Letters column. Having since collected much of the surrounding run, I can now appreciate it as an anomaly as well-- the art and writing are far above average for the series.