NES era- Super Mario Bros 3.
GEN-SNES era- I spent a lot of time on Sonic 2 and Chrono Trigger but thinking about it. I think the game I most played was Mortal Kombat 1-2.
PS1-N64 era- Zelda Ocarina of Time (Honorable Mention to Final Fantasy VII)
Dreamcast-PS2 -XBOX-GC- Surprisingly while not my favorite game it was probably Speed Devils Online for the DC (my high school grades suffered bad) because of my addiction. Honorable mention-Halo
PS3-Wii-360 era- Skyrim honorable mention Gears of War.
PS4-XBOne-Switch era - Breath of the Wild honorable mention (Horizon Zero Dawn)