I am a Miner AND Woodcutter, and I think both are pretty good. Miner is good because not only are you making money from breaking stone and ores, but you can use/sell the ores too. I've made most of my money from mining. Woodcutter is good for about the same thing, as you get money from breaking wood and you can sell the wood for extra money. I picked Miner just because I mine a bit more then I cut trees.
