I'm not sure what I would do with 10 or more days. I find the sweet spot to be 5-6 park days, 7-8 total nights. MK warrants 2 days, Epcot 1-2, AK 1, HS 1. However, an average time away from WDW in my household is 8 months between visits. I guess I go often enough to get my fill.