Nooo!! Don't go to the dark side, Hussey, there's still hope! On the whole, painted textures blow, especially of metal. If you need evidence look at stoned-dude's work from when he was painting textures, and from later when he started UV mapping his weapons to photographs: like night and day. Usually if there's any problem, you can just use clone stamp tool and a small amount of painting to correct any problems with lighting, etc., in a real image.