Besides Mario, I'm interested in Sonic, Kirby, and Pikmin. That's about it, really. Mario is my top, closely followed by Sonic, and Kirby's somewhat below. I really just got into Pikmin because my brother loved it and was always after me to play it, so we had a deal involving him working on a project in exchange for me playing Pikmin and Pikmin 2. Great and fun series, especially the second one, but there's not really enough games to consider it a "series", so to speak. Yet, anyway.