We have done both our last couple of trips, but do Universal first. Like others have said, we do Disney last since we really like it more and want that Disney magic to be the last part, but I don't love the Universal thrill rides and feel sick on virtual ones, but do LOVE Harry Potter. But, after reading these responses, it has me thinking about how the reverse might be better in some ways. Whichever you do it is going to be fantastic and since your family loves the thrill rides, I agree Universal will be a big hit at the end! And I have only stayed at one Universal hotel, Royal Pacific, and we really liked it. They are all really nice though.