Hi dilligaf, We went from carpet to laminate floor downstairs two years ago, I find its more practical to keep clean as I have a dog and I still like its appearance, however I miss the comfort and warmth of carpet and being able to stretch out on the floor to watch telly or read. We will being going back to carpet downstairs in the future with perhaps the exception of the hall for practicality.
I have friends who have laminate upstairs and they all regret it, find it cold and very noisy .
I probably havent helped really but hope you find what ever you choose works well for you.