1. How did it start? Have you always been intolerant since birth?
2. What do you do? Do you avoid dairy at all costs, do you take a supplement (enzyme), or do you ignore your own intolerance and drink/eat dairy (and then regret it)?
3. And to what extent are you intolerant? Is it only pure milk or literally anything that has traces of milk/dairy in it?
For me, as a kid I wasn't lactose intolerant and dairy/milk was a normal part of my diet. When I was in high school I stopped drinking milk for some time, and then when I started again I was suddenly intolerant to it.
Nowadays I don't drink milk (I use lactose free milk whenever I eat cereal or bake). Cheese doesn't make me sick unless it's a lot, so whenever I eat pizza I never choose one that has a lot of cheese. As for baked goods, it's all fine unless they are heavy on milk - last month half a slice of tres leches cake had me in bed with a lot of pain in my stomach. Ice cream is also a no no.
What about you guys?
i can't imagine myself not eating cheese or ice cream 
