Typical passenger is more active, and creates their own fun, rather than waiting to be entertained. Virtually no entertainment aboard, except for one silly game the crew ran one night. You get your entertainment from the scenery going by. Our room was on top deck, and separate from the rest of the boat structure. You create your own fun onboard these ships.
Crew works very hard.
You'll feel pampered, but not like on a big ship. Their ships never go in open ocean with passengers. You sail the inside passages or on rivers. Take plenty of film - preferably rated for overcast days, as sunshine is inconsistant and fleeting at best. A camera with a good zoom lens would be a definate asset.