It would all depend on when I arrive and how long my trip is.
I once arrived in the early afternoon, checked into the hotel, went to DTD for a lunch, enjoyed a few shops, then went DHS just to see Fantasmic. The reason I went into the park was that I was staying a week and had 7 days of tickets, which pretty much guaranteed that I would either get a short day, or waste one. In this instance, Fantasmic was only showing twice while I was there, and I really didn't want to go to DHS the other night it was on. So it made sense to visit that particular park that day.
On the other hand, I would like to go for about 3-4 days one spring to see the Flower and Garden exhibits at EPCOT. For a trip that short, considering how much time I'd spend on taking photos in EPCOT, I would want to maximize my tickets.