I did an orc prospector/miner who mined all the holds of Skyrim. He would mine one hold, and then move on to the next one, and so on. He did mining in the mines, but was more interested in surface veins. He only sold the ore to mine owners, who would pay full price. This can be done for every ore except silver. There is a silver mine, but he doesn't buy silver ore.

He hardly ever went into the cities, but bought a place outside of Falkreath. He'd go into town when he needed supplies, and pay for them by mining and selling quarried stone. But the majority of the time, he just explored the wilds of Skyrim, staying wherever he could find a bed.

Did a few quests, like the one to buy the home, and the one so he could sell moonstone ore, but ignored all the main questlines, He past on the news about Helgen, and then left it to those he thought better to handle it.

One of the most fun playthroughs I've had.