How to add creamy taste and consistency to pasta dish with cheese?
This is going to sound a little facetious, but a good way to add creaminess is... Add cream. 

If you want something a little lighter, you can use a few egg yolks, tempered and whisked with hot pasta water and mixed through the pasta with the rest of the ingredients. This, along with plenty of parmesan, is the basic method for carbonara.