Cookware

I use the stainless mostly and it’s not to bad if you keep it greased. Cooking fried potatoes on stainless is the worst they all stick to the pan, all the work chopping them up and half our stuck. My ex took most the stainless so I’ll need new cookware soon. I’ll have to check out the cast iron I also have a glass top stove but it’s pretty scratched already.
Does the stainless discolor too?