I like your very cheerful quilt.
To answer your question, I often make scrappy quilts from my excessive collection of scraps. Because I like to use 2.5" squares in some of these, I have started to take my scraps from current projects, cut them into the squares and bag them so that they are ready to go when I am. I also have bags of strips. What I do not like is totally random scrappy. I like things to have some sort of order. Sometimes this means using some non-scrap fabric. The quilt only needs to please the maker and the person it goes to. Your quilt, your decision.