>>55885571In the series it was shown that each Rotom has a personality according to its device, for example a washing machine Rotom was obsessed with removing dirt and hardly spoke, while Ash's Rotom Dex was chatty and wanted to be a detective, when they changed "bodies" They were both very unhappy.
Also according to the lore of the games, the Rotoms take possession of a device to be able to interact with people, so I imagine that the Smart Rotom are gossiping Rotoms who like to listen to other people's conversations or sharing photos, the exception is the Smart Rotom of team rocket who would probably be more happy inside a weapon of mass destruction.