i have had disney ap's before and started buying the ap's for universal in 2003.
i guess it depends on which parks you would enjoy more and not get tired of repeating the same rides 2-3x's a year.
for me, i dropped the disney ap's as i got tired to doing the same rides during 2 long trips within the one year period.
i got tired of the over priced rooms even with the ap discounts. (when i could get those discounts)
universal i didn't.
you could do universal for a few days with day tickets.
2 day park to park ones.
if you think the kids would enjoy doing the darkside for 3 different trips, upgrade those day tickets to an annual pass while you are in the park.
10 and 12 yo usually never tire of rides....................