Aside from Pokemon, there were several games that made up my childhood when I was still in the days of regularly playing PlayStation.
Honorable mentions in my case especially go to Crash Bandicoot, Tekken, Spyro, Jak & Daxter and Ratchet & Clank. I couldn't get enough of the bright colorful characters and the storyline. I still play them when I can't access my computer.
That nostalgia still gets to me when I play.