I don't really have another favorite series, except Mario Kart, and Spyro (its trilogy for sure). I do enjoy games within different franchises, such as Mario 64 and Yoshi's Story as standalones. Donke Kong 64 is very good, the entire Star Fox series (at least those I've played), Sonic and the Black Knight, and Star Wars: Force Unleashed. These are all that come to mind, though. Could be a lot more I'm not recalling.