Nope. Cruise ships can be extremely different one from another. There are tons of different kinds: huge ships, small boats, river ships, exploration ships, sail ships, extremely luxurious ships (almost like private yachts), etc. The great thing about cruises is that there is literally something for all tastes!
Need a helping hand ?
Start with a search! E.g. "Should I reconfirm my airline reservations?"
Why Go On A Cruise?