a. Large Ship’s: a range of free & premium cabins, dining, amenities, entertainment & activities in a colossal extravagant cruise ship. …. offer a mix of ---
    - basic to suite cabins,
    - main dining room/buffet to premium dining cafes,
    - an array of free to exclusive amenities:
        -- pools, exercise room, etc
        -- exclusive, premium/pre-arranged amenities
        -- activity access: massages, special
            entertainments, etc

Usually most is available to all at a Premium add-on cost.    

b. Mid-range Ships: (500-2000 guests): More expensive, fewer amenities, but more upscale, generally a quality notch, sophisticated above large ship’s amenities, camaraderie, intimacy, service, amongst fewer guests, greater itinerary flexibility and small port accessibility, deeper engagement.

 Pros:    

    1. Better value: each Cruise Factor may be a notch above. 
    2. Balanced: a good middle ground between a range of
        amenities & intimacy.
    3. Service: More personalized, with staff often recognizing
        guests.
    4. Less Crowded: reducing chaos & wait times for amenities &
        activities.
    5. Guest to guest bonds: more intimate & relaxed sharing;
    6. Better amenities:  better, but fewer amenities & extra options,
        massages
    7. Flexibility: visits more, less busy & unique ports, sites &
        activities.
    8. Port Access: go where larger ships can’t or fit, so less chaos
        at sites.

     Cons:
           1.  Cost: high $/night cuz fewer people & less economy of scale.
           2.  Fewer Amenities: but upscale
           3. Activities: Less variety of activities, yet substantial.
           4. Guest to guest: Less diversity, but deeper engagement

c. Very small ships/boats: (? to 100 +): all small boat Cruise Factors strongly depend on the ship’s mission: super luxury & comfort, scientific, sports, adventure, educational; trending to shorter trips. Greater port/shore accessibility, fewer guests, intimate purposeful focus, more cultural immersion, & Friendly.

Whatever you imagine that can be aranged.

     Pros:

1. Boat Size: small cruise ships to intimate sailing yachts.
      a. Current Trend: high quality, less crowded, smaller boats,
   less chaotic sites, intellectually worthwhile, experiential experiences. 
      b. Windstar Cruises intimate sailings & snorkeling in pristine lagoons.
2.  Destinations: access to tight harbors & more shallow bays, & sites. Antarctica, the Galápagos Islands, or remote Arctic
   regions(Antarctica) & less crowded ports with unique itineraries.
          Windstar Cruises intimate sailings & snorkeling in pristine
               lagoons
3. Cruise Length: varies, but trending to shorter 4-10 days or tailored
4. Accessibility: narrow passages, shallow bays & ports docking at small, picturesque ports.          ➡︎➡︎➡︎➾➾
5. Guest #s: range from just a few to 100, less site waiting time, VIP access, especially in popular tourist areas.
6. Personalized Service: high crew/guest ratio, more excellent service VIP site access
7. Camaraderie: More intimate, boutique experience & common focus.
8. Amenities: high-end amenities with flourishes, all-suite cabins, gourmet dining & high staff-to-guest ratio.
          Windstar Cruises, Silversea Cruises, and Seabourns’:
9. Gourmet dining: gourmet, localized dishes,
10. Cultural Immersion: smaller boats, longer port stays & fewer people, can facilitate deeper cultural experiences: local foods & unique off-beaten path sites & interactions with local communities
11. Expedition: niche focused on adventure, exploration, & often hands-on learning in remote & ecologically significant areas: polar regions, remote islands, deep fjords, or dense rainforests.
12. Adventure & Sports: kayaking, hiking, or scuba diving in remote locations.
13. Educational:  Biological diversity & natural history, Amazon Rainforest (river cruises), Remote Islands & Archipelagos, Australia’s Kimberley or Papua New Guinea islands; ever more often into harsh environments, yet luxury ….  expedition ship’s deep-sea exploration and marine biology focus.

• Seabourn, Silversea, & Viking: unparalleled comfort (diving drones)

14. Design your own: Exclusive, you tailor own cruise, if money no object.
15. Small Shore Excursion group benefit:
16. Eco-Friendly: low carbon footprint; less noise & obstruction

      Cons:

1. Cost: Usually higher cost/night cuz LESS economy of scale, matches values.
2. Limited Amenities: adequate, but quality, intimacy & experience trumps.
3. Dining /Activity Variety: depends on cruise vaues.
4. Motion: Bad in rough seas for seasick-prone.
5. Limited Capacity: may book fast requiring very advanced booking; CON for solo independent travelers.
6. Privacy: less solitude except in cabin.
7. Limited Luggage & Personal Space: pack accordingly [pplk: packing

But, higher end amenities vary with mission, seasick motion, limited luggage & privacy.