There are a lot of benefits to going dairy-free, but there are some downsides too. You've probably been taught, since you were young, that you had to have milk with dinner and get your dairy in for the day according to the food pyramid. Dairy nourishes our bodies with protein, vitamin D, calcium, and potassium. Those nutrients are super important! Won't you die if you stop drinking milk and eating cheese?
No, you won't. But if you decide to stop having dairy, keep in mind that you'll need to make up for the loss of dairy's nutrients in other ways. Because I want to have strong, healthy bones and not get osteoporosis, I started taking a calcium supplement, and I'd already been taking vitamin D supplements for years. I did notice after the first week that I wasn't getting a lot of protein, so I made a point to eat more meat and add high-protein foods like quinoa into my diet. Whatever you do, you should always speak to your doctor first, before taking any vitamins or supplements or drastically changing your diet.
Many people report weight loss after quitting dairy. I didn't lose weight, but that was never a goal of mine to begin with. I can tell you that I felt less bloated and puffy. Whenever I have a cheese relapse, I get an overall icky feeling. I generally just feel better overall, skin aside.