My DH is not a big theme park fan either. So we make sure to include some things that are more fun for him too. Renting a sailboat is his favorite and some of the Disney resort marinas have them, as well as other kinds of boats - mini fast boats, pontoons for cruising or fishing, canoes at the campground. You don't have to stay there to visit and rent from those marinas. My DH also enjoys dinner shows and restaurant dinners just with me ("date night") along with long walks together through the resorts, even though he likes family dinners with our kids too.
The Orlando area has many other fun offerings - golf courses, tennis courts, museums (the Orlando Science Center is very good), airboat rides, sky diving, horseback riding, swimming/snorkling with dolphins, canoeing at a state park, day trips to the beach. So a question to consider is what might he like to do on a vacation somewhere else and see if you can put a spin on it, providing something similar in Orlando.