Thuggins,
Some people accept 'good enough' and others demand perfection. A spot meter allows perfection, an averaging meter delivers good enough. Before I got my OM-4T bodies I carried a Gossen Ultra Spot II and used it for everything even when the camera had a built in meter. The averaging meter in my OM-T bodies matches the spot meter if you meter an area of even tone, so they don't need looked at. The problem is you need to guess at how much compensation to use with a non average scene because no one, not even you, can evaluate a scene and know how far from an average exposure it deviates. I don't like to guess.