These comments are personal observations based on our own cruise experiences over a number of years. We haven't been everywhere and we may have missed some of your favorite places...
Several cruise lines in the Deluxe and Upscale class assign a ship to extended cruise itineraries around the world. Some actually do a full circumnavigation of the world, and some people actually sail the full journey. They obviously don't have a job! Many of these itineraries are broken up into smaller segments, typically 14 to 21 days.
If Hawaii is the place you want to visit, there are several cruise itineraries available. Some cruise ships will visit Hawaii as part of the repositioning cruises en route to Alaska. Another exotic itinerary takes you from Hawaii to Papeete (Tahiti) via Christmas Island. From there, you could cruise the French Polynesian Islands of Moorea and Bora Bora, then to New Zealand and finally wind up in Sydney, Australia.