I would be doing some serious reading here for a couple reasons...first because "best" is totally subjective, and there is no one "best" for everyone. Second reason, there are a number of choices in routes...7 day around Hawaii (NCL only), 10 day one way to or from Vancouver, or 15-18 day round trips from various West Coast ports.
The cruise lines you are familiar with will have similar products on this cruise. So what you like about XXX cruise line, you will still see on a Hawaii cruise.
You want a sea condition report for 12 months? Really? First, the trips from West Coast to Hawaii generally only run October to April. (Noted, Princess has at least one summer cruise. Second, seas can be rough any time, anywhere. Third, it is commonly discussed here that the first 48 hours or so departing the West Coast, and the last 48 hours returning to the West Coast, can be a bit rough at times.
Excursions are ALL about your interests. What is "best" is what interests you.