With endless replay. Rollercoaster Tycoon 1&2. Shout out to Open RCT (sim city 3000 is a close second)

Console favourite- The Legend of Zelda Links Awakening

Sound track - Chrono Trigger

That long play (where you forget what you were doing if you put the game down) - Metroid Fusion/Prime

Pokemon - Emerald or Soul Silver depending on my mood.