I carry anything that I think might leak in my checked in suitcase. I don't like to take any chances.
Also meds, all jewelry (even costume) docs, money/credit cards, glasses, contact lenses. I don't pack a change of clothes though, never had a problem.
Bonnie, how do you do it. I couldn't pack for a 10 or 11-night cruise with only carry on. I'm lucky I can do a large and small suitcase for each of us.