Ask Lemmygrad

Do not drink raw milk.

Depends on what you are using it for and what you want out of it.
Whole milk has more fat, more macronutrients, and is more calorie dense. Personally I do not drink whole milk but I will use it in certain recipes as it's generally better to cook with. I make my own yogurt, ferment for 24 hours, and strained whole milk yogurt is a whole hell of a lot creamier. It's almost like a thicker sour cream but with a super high protein content. I use those yogurt to make salad dressings, dips, and also mayonnaise substitutes.
Skim milk on the other hand, still has decent macronutrients, and same protein content, but without the fat so it's much lower in calories for the same size portion. I like to make yogurt primarily out of skim or 1% milk. The end yogurt is much firmer and not very creamy but much lower calorie and packs a punch fo protein. I just eat it plain for the probiotics and a bump in protein for the day.