I'd love for constellations, random events like in GC (morning aerobics, watching the lighthouse for Tortimer, etc), asking villagers for jobs, and just less predictability in general. I like some of the control in things in New Leaf, but I miss how unpredictable things were in the older games. Like the villagers reprinting your roof random colors in GameCube. Oh, and villagers being meaner again. I miss how much cranky villagers had to warm up to you before they were friendly.