My favorite is Mario Galaxy. It's the only Mario Game I've gotten in (aside from new super Mario bros 2). I almost beat Galaxy, but I got distracted for a bit and just stopped playing. I've tried other titles but just haven't enjoyed them. The first one I can't get far in because platforming isn't my thing. Sunshine is uber difficult. Odyssey I got fairly far in, but I got bored of it and didn't feel like continuing. Galaxy is challenging without being over difficult, and I absolutely adore Rosalina's storybook.