I have a real soft spot for cooking systems in RPGs, and Skyrim adds the fun of hunting for your meat, but my primary character is a crafter, so his alchemy skill has completely eclipsed the value of chasing down elk and then lugging venison around.
Food will always be a poor stepchild to alchemy and restoration, but its benefit if used exclusively would be that you would be levelling two fewer skills. Is this enough of a plus that a food-only character would be viable?
Anyone tried it?