Explorer
When he does not have any immediate tasks (or has little) this hearthling goes adventuring, discovering new territory around your town. He likes uncharted territories and newly discovered caves, but tends to avoid combat if he stumbles upon overwhelming enemies, preferring to “tactically retreat” instead.
Can work well after the “fog of war” is implemented.
Researcher/Mrs Croft
This hearthling is obsessed with knowledge and artifacts of old (and not so old). He likes tinkering with newfound artifacts and trinkets, discovering their properties.
My idea is that in addition to common loot hearthlings can find “unknown treasures” that require investigation before they can be used (akin to “item identification” in Diablo or “artifact unlocking” in Dungeon Keeper). This can be pieces of furniture, crafting recipes, building blueprints or even some hearthling gear. “Researchers” may work in different ways: getting bonus emotions from researching, prioritizing researching over other tasks (which can be a con in they have low MIND stat) or doing researching faster than other hearthlings.
Animal hater
This hearthling dislikes animals. All animals. They can bite him. He may not kick a kitten but he doesn’t like animals being around him. He believes they create more bugs in the game.
Animals tend to sense his disposition and try to “talk” to him less.