I remember 1998 was the single greatest year in gaming for me until 2007 surpassed it and gets my vote for greatest year here (2017 was also amazing though).
Bioshock, Super Mario Galaxy, God of War 2, Picross DS, CoD4 and Portal would be enough for me. But the birth of Assassin’s Creed and Uncharted along with Halo 3, Prime 3. Super Paper Mario, No More Heroes, Crysis; Wii Fit was a thing for some people and even the music games were still fun that year. The only thing that brought it down was DS Zelda being a bust but 2007 remained the best year in gaming until last year finally surpassed it for me (2023 was just bananas).