Happy 25th anniversary! That IS a milestone to be celebrated.
As for fast passes, I agree with what was said above. I just did mine (for October) last month. I looked at AK first so I could get the Pandora stuff. We actually opted to NOT do the Flight (2 people, 4 really bad knees) and I’d love to do that with DH. I made a list of the must do and which days we were in that park. Then I prioritized them and went for FPs in that order. I got everything including Frozen late in the list (what a difference a year makes!)
But remember, not matter what, you’ill be together and you’ll be at WDW. Have fun and make sure to visit your own special smooching place – ours is under the bridge heading from Epcot to the resorts.