Pretty cool question man. Overall, across the world I feel that there is no doubt PS1 made a massive impact. So many huge games, spread across so many more countries.
At the time for my friends and myself? N64 by a mile. 4 player 007 Golden Eye, the Zeldas, Mario Party, I could go on and on. We still did have a ps1 and played Tekken, Soul Blade and some racing games.
At the end of the day, I guess it is where you lived at the time!