I like to think of myself as a somewhat hardcore Disney Vacationer.
Ok, so, i personally believe Epcot is a MUST....Soarin...possibly the whole world showcase, Test track big deals. I love a lot of the others stuff like Ellen and Bill Nye, i love Turtle Time w/Crush, it's so hilarious.
Here is the thing, if your SO is into sciencey/gadgety stuff...he seriously needs to go to Epcot. There is a virtual roller-coaster you can create.
So i will just say this...you basically have 3.5 days to spend. Quick answer, there is no way you can see everything. So, what can you do to get the best of what you have.
This is only one man's opinion. You have 4 parks (no water parks), for me, a 41 year old man who LOVES Disney, That's more or less 3 parks so you have to omit one of them.
If i had to eliminate one park I would honestly Eliminate Magic Kingdom. Yes, i know what your thinking...No MK is UNHEARD OF...but here me out. I would recommend either skip AK or MK. Here is my reasoning why:
HS is awesome, Epcot is awesome. AK is also awesome and a lot of MK is just as awesome as the rest, HOWEVER...I'm thinking of the audience, the two of you and actually more specifically him based on your previous post.
So to me, MK is overall a younger crowd. You are looking for your husband to enjoy this so you guys can go back and enjoy it more. Keeping that in mind, i would think MK may possibly more annoying than the others. Lots of very young kids in some of the sections.
If i ranked the parks, HS/Epcot, then MK/AK...and please just know. I LOVE THEM ALL.
You can omit or require any park based on preferences right? If you want to taste beer and wine from around the world...you have to go to Epcot. If you like science and other technology stuff, you have to go to Epcot.
If your SO doesn't particularly like Animals, then maybe AK the better choice.
HS is just amazing and ton's of fun and something i believe most people can relate to...music, movies and stuff. I would not suggest omitting that park.
I believe there is only 1 place you can get a beer in MK...that could be important to some.
Also, are you staying on Disney Property? Extra Magic hours would make or break any park visit for me...if there is late extra magic hours...that's where I go. When I went, the MK was open until 2am with the magic hours, so much fun.
There is a lot to consider. Feel free to PM me, i love talking WDW.