N64 for me, because of local 4-player multiplayer and I just think most N64 games hold up today compared to their PS1 counterparts.
I can easily go sit down and play alot of PS1 rpgs today as easily as back then, the 2D sprite works ect look amasing.
The same just isnt true for the n64.
ex Suikoden II:
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071