Yeah, we always do both parks on one day. We don't ride everything, but we do seem to hit all or most of the majors. 2 weeks ago we went for a short day, didn't get there until 10:30am, here's what we did:
IOA start
Cat in the Hat
Sky trolley in Seuss
Dragons (hubby rode 2x, once in the front row seat)
FJ
Hippogriffs (kids love this, dd13 rode it 3 times)
(Also had a frozen butter beer and looked at the wands, but not the show)
Hulk
Spiderman
Ate lunch in Hero Island at the pizza shop
Doom Tower
US
ET
Woody Woodpecker coaster
Simpsons ride
MIB
Disaster
We wanted to do Mummy but the park was closing by that time (6pm closing) so we headed out. But against this is a short day since we got there late and the parks were cllosing early.