Damsels are basically saltwater cichlids. They behave very similarly, though not as much personality, IMO. If you want personality in SW you have to look into the less "pretty fish" and more unusual fish, like hawkfish, blennies, jawfish, dragonettes, eels, triggers, puffers... But captive bred Clowns are extremely hardy. Easily as hardy as most FW fish. Mine lived trough tons of things when I first started my SW, and he does have a nice, if not super unique, personality. My number one peice of advice regarding getting into SW: Never, ever, ever, buy fish from Petco, or low quality LFS, unless you plan to quarantine. Getting ick and other similar parasites/diseases in SW is a much bigger deal than in FW. It will kill, fast, and is very difficult to treat in your show tank. Everything else in SW is fairly similar to FW, with the added requirement of keeping the salinity stable, which isn't hard, it is just a pain, unless you have an Automatic Top Off.