The best C64 games were Mayhem in Monsterland, Turbocharge, Thunderblade, Spy Hunter, Turbo Outrun and Outrun Europa - all from the middle to end of the C64's life (except for Spy Hunter). Ghostbusters was also good, as was Creatures 2.
Old Ricky Dangerous was okay, as was my Walker game (completely in 6510 Assembly - it might still be availiable from the Binary Zone PD place - if thats still going).
Some irritating ones were : Siren City, The Human Race, Arcadia 64, Neoclyps (borderline), Bandana City (came with the head-alignment cassette), Driller (slow!), Elite (never liked Elite on any computer), Depthcharge, Lazarian, Hunter Patrol (music was good, but that was about it).
Beachhead was irritating to start with, but once you got the hang of it, it was okay. And I completed it.
I played Lemmings on the Amiga (of course), got so far and then gave up - as it was a friends Amiga, I dont think I missed that much.
I had wanted to get the Chase HQ 2 cartridge, but never did...