Depends a lot on what your DH likes. Is he into sports, or is he a gadget guy (like me)? Does he like thrill rides or educational tours?
Either way, I would probably not take him on "Its a Small World" for his very first ride.
Most guys like stuff like the Ultimate Home Theatre experience in Innoventions at Epcot. If he's into educational stuff, gadgets, or computers then he'll probably like Epcot's Future World. If he likes reading about other cultures, reads
National Geographic, or likes travel, then he will probably like Epcot's World Showcase.
If he likes movies, TV, soaps, or Hollywood, then try MGM Studios.
If he's into camping, nature, pets, then try Animal Kingdom.
I would avoid MK the first day until he gets into the Disney "spirit". When you do go to MK, try Hall of Presidents, Haunted Mansion, and Space Mountain. To get him into the spirit of being a kid again, try Tom Sawyer's Island. Make sure he runs over the barrel bridges and goes in the caves. That'll get any guy remembering his good childhood moments. Then go on some of the more fantasy-oriented rides like Buzz Lightyear, Peter Pan, etc. He might also like the Diamond Horseshoe Revue. Now the hard part - try to get him to eat something new! I'd recommend the Corral Reef sandwich at Columbia Harbor House. It is hummus and brocolli slaw on olive-loaf toast. Sounds horrible and tastes absolutely delicious. I have never met anyone who didn't like this sandwich once they tried it.
Mmmm - This is making me hungry.
Bye for now - I'm going over to MK myself for a Corral Reef sandwich!