So I voted 4-5 days but really our averages are 2-4 days. Our longest trip ever was 4 park days and 5 hotel nights and our shortest trips have been just 1 day as we drive in so no real travel required. I'd say our sweet spot is 3 park days and 4 nights. We might skip a park or hop (especially a lot more now since you have to have a park reservation and there are times we only book a few days prior so I just take what I can) and like to do 5 nights but we usually tack on family visits, beach time or other travel with Disney so we cut it short. I could see if we only went every 2-3 years then we would probably stay longer. I laugh when people say they only have 6 or 7 days in the park, how will they get it all done, it's like seriously, how could you not get it all done, that seems like so much time.