3rd - Sonic the Hedgehog (Master System)
4th - probably a combo of Super Mario AllStars (mainly for SMB3), Super Mario World and Yoshi's Island
5th - at the time, probably Goldeneye. However, I've played Super Mario 64 countless times over the years. Also got plenty of mileage from the first two Tomb Raider games as well.
6th - Resident Evil 4 or Sonic Adventure 2. Put well over 100 hours of gameplay into each.
7th - Super Mario Galaxy
8th - Yoshi's Woolly World
9th - The Legend of Zelda: Breath of the Wild