I had two that were pretty picky growing up. My oldest didn't like cheese unless it was on a cheeseburger or pizza. He didn't like a lot of veggies or fruit either. He didn't like anything that was mushy or slimy either...like mashed potatoes, jello, oatmeal, etc... Now, he's 28 and loves everything. Seriously...anything!!
My second son was just awful. Mealtimes were horrible. I tried to always put things on the table that we considered part of the meal, just so he'd have something to eat and I didn't feel that we were catering to him. Those were apple slices, bread with peanut butter on it, and carrot sticks. He would eat pasta like your son Lauren..just butter or olive oil. Unfortunately, he is still a horrible eater at 25. He is back home living with us, and I just try to keep food in the house that he can eat. He likes Teriyaki burgers, so we make those occasionally. He won't eat mayo or mustard, so if someone has made a sandwich and either of those have touched it, it's garbage to him. He eats NO veggies, but likes some fruits now. He also eats so much junk food...and he's so skinny and can't put weight on. Really? Why didn't I get those genes?
My other two thankfully have always been pretty good eaters. They have always eaten most everything. My youngest doesn't like cereals though, although he'll eat cream of wheat, and he doesn't like most cookies or any sweet breads at all. He wouldn't eat any cookies when he was young. Most people couldn't believe it!
I think having picky eaters was one of the hardest things about raising kids. Every day and every meal was such a struggle.