@BeckyT13 Your question is really more about you than anyone else and, therefore, only you can answer it. We tend to go for a week... do two or three days at Aulani doing beach / pool / spa time and the rest exploring Oahu. So, if you don't consider the beach and the pool a "main attraction" you might want to look at a different resort.
Driving Oahu is easier than our metro area so I wouldn't hop
OP - we spent 10 days on Oahu with 2 kids under 12, and resort hopped 3-waikiki and 7-aulani. We only left Aulani/Ko Olina area on 1 day during that 7 days (we had a rental car the whole time) and I do wish we had spent more time doing trips elsewhere. If I could do it over again, I might have split the trip 5-5 and saved a little money. The Waikiki area is more convenient than Ko Olina to drive to other places on island. I would still stay at Aulani at the end of the trip, splurge on the spa and fine dining experiences there, and relax.
Things we really enjoyed at Aulani:
The pools: there are a lot of them, and if you're a water slide or lazy river fan, I would spend at least 2 days doing that
Snorkeling: we paid the length-of-stay so we could bop in and out with the kids. If only adults, maybe go once (and stay longer than 5-10 minutes, lol). We also snorkeled in the lagoon and saw a few fish and some sea turtles, which was exciting.
Dining: we went to several restaurants outside Aulani that were a short walk or drive (Roy's, which you can walk to but we drove because kids). All the usual suspects listed here.
Lagoon/Beach: we also stand-up paddle boarded on our last resort day, I wish we had done this sooner.
Spa: because of the kids, DH and I split up and did this on 2 consecutive days instead of together.
There were other adult activities, like stargazing, some ukulele lessons and other things we did not do, that we would have done if our kids were older. We didn't feel like we ran out of new things to do until day 5 or 6.
I wish we had explored the North shore more, this was our first trip to Hawaii where the kids were out of strollers, didn't need to nap, could hike, etc. We would have done surfing lessons also, but inertia took over once we checked in to Aulani.