I feel like this is the drawback to precuts. It’s not necessarily a bad thing, but it does stunt your artistic development. You have a lot of fabric, with which you can do a lot of things. My advice would be to take a step back and expand your color theory and design skills. Search on amazon for ‘quilters guide to color’ and you will find a number of great books on the subject. I don’t think the answer is quite so much 10 or 20 prints, but more, what type of aesthetic are you trying to achieve? It takes time to develop your style, and only you can answer those questions for yourself.