Now you've got me longing for my old Atari back. My top 3 games by a country mile were:
Supercars 2 - must have played it through a thousand times.
Ellie Frontier - sank many hours in to it despite never being very good at combat.
Sensible soccer - one of the most fun games I've ever played. Would often play with my step dad. Some epic matches.
Oh how could I forget Transport Tycoon! What a classic. I will fire it up occasionally to this day.