I liked Snoopy & The Red Baron too.
My favorite Atari games were mostly based on the best arcade games. As a little little kid (5 to 7 years old) I wasn't yet spoiled by the NES's standard for home coversions. Actually, Atari had this *really* talented 2nd party developer called General Computer that did pretty much *all* the good arcade translations that Atari published. Thus my favorites were...
-Asteroids (Atari, based on the arcade game)
-Bowling (Atari)
-Carnival (Coleco, based on the arcade game by Sega)
-Centipede (General Computer, based on the arcade game)
-Circus Atari (Atari, based on the arcade game)
-Crystal Castles (General Computer, based on the arcade game)
-Dig Dug (General Computer, based on the arcade game by Namco)
-Journey: Escape (Data Age)
-Mario Bros (General Computer, based on the arcade game by Nintendo)
-Mouse Trap (Coleco, based on the arcade game by Exidy)
-Ms Pac Man (General Computuer, based on the arcade game by Namco)
-Q*Bert (Parker Brothers, based on the arcade game by Gottlieb)
-Real Sports Tennis (Atari)
-Snoopy and The Red Baron (Atari)
-Venture (Coleco, based on the arcade game by Exidy)
-Video Pinball (Atari, based on the arcade game)
Those were pretty much my favorites. I never got the appeal in games like Spider-Man, Missile Command, Superman, Haunted House, Space Invaders, Swordquest, or even pitfall.