Final Fantasy X is the best video game ever. It also has the best ending ever.
Starring Tidus, Final Fantasy X was the first game in the Final Fantasy series to be completely rendered in 3D and have voice acting. There was no world map to go wherever you wanted until you got to the endgame; areas are connected by linear paths that are really their own area. There was also an emphasis on dungeons where you had to solve puzzles rather than fight random battles.