Thanks for the compliments, everyone
My trips tend to be short, because my travel companion is finishing a medical residency and they are strict on vacation - saturday to the following sunday only.
This year, getting to HNL before noon on Saturday was a gift of almost an extra full day - which we would have taken advantage of (there was a festival up at Koke'e on Kaua'i) if there wasn't a constant downpour all day.
The pace of our travel isn't for everyone - because we go to Hawai'i fairly often, we can pick and choose what we want to see, leaving things for next time without feeling we missed out, or going back to see favorite spots again.
If you're talking about 14 nights on the Big Island, that is more than enough time to see just about every highlight and tour available with no stress and time left over to relax at the hotel. I think a 14 night trip should be spread over two islands (or even 3 for some), but that's me.
With 14 nights, you could certainly split your stay area between Kona, Kohala and Volcano.
We easily cover two islands from sat-sat without stress or missing out on alot.