I do have winter vs summer bags. In the summer, it's potiron, cyclamen, soleil and rosy. Winter bags that rarely come out in the summer are raisin, vert olive, black, and rouge H. The only true year round bags that I use are etoupe, bj, bleu roi and bleu sapphir. For some reason, the blues that I have are so easy to span 4 seasons. It's truly more dictated by the clothing I wear, which tends to be brighter and lighter in the summer months. I feel raisin and vert olive are just too heavy looking in the summer. Black comes out every now and then, but honestly, very rarely in the summer.