I never thought what you got from mining would be worth the extra weight of carrying a pick. Then I tried carrying one with me always.. It's great. Not so much for the ore but for the gems. A great way to make money. I get an iron ingot, use a spell to convert it to silver, use a forge to make silver rings and then jeweled rings, enchant them with a petty soul gem and instant riches. I don't even bother enchanting other items for sale. Even better with Skyrim Immersive Creatures the Ore Spirit that sometime attacks when you mine is fun.