We are in the same boat as you, having done Disney twice in the last 4 years. Our son has been begging to go to Universal so we finally caved this year, but my wife and I definitely are more Disney types. We haven't been to Universal since the 90s either. What we did is we booked both the Magic Kingdom After Hours and Animal Kingdom After Hours events to get our Disney fix in. We are going to keep our hotel at Universal the entire time though. Changing hotels in the middle of the trip sounds like a big pain and takes away valuable time. We are getting there on a Monday night, and leaving on Friday. We have the 4 day, 3 park, park-to-park tickets. We didn't even factor in being able to use Volcano Bay because in March, it can be iffy whether or not you can do that stuff. We've gone to Disney during that time when it's been warm the entire time, but last time we had a couple of chilly days where we wouldn't have gotten much out of a water park. But the ticket package deal for all 3 parks was the best deal. When we arrive on Monday, that's the night of the Magic Kingdom After Hours, so we aren't even going to go into the Universal parks that day. We are just planning on eating early at Citywalk then heading to Magic Kingdom. We will then have all day Tuesday, Wednesday, and most of Thursday (as we have to leave early for the Animal Kingdom After Hours), and then we will have Friday morning before we have to head out. I think we will have plenty of time having the Unlimited Express Passes. I could be wrong, but I hope it's enough. My only concern is we may not get decent pool time at the resort, which is something my son loves to do on our trips. But we will just see how it goes. Sometimes our son craps out early at the parks and just wants to go back to the resort to swim.