I've recently cut down my rotation.
I have a white dress shirt with french cuffs from iTailor.com that I love, will get more from there. Plus a royal blue and a light yellow shirt with french cuffs, but forgot the maker. I have a gray, a blue, a yellow, a red & white plaid shirt, & a light blue & yellow plaid shirt that my daughters bought me from time to time. I also have a gray Penguin polo and a green Penguin golf shirt. Then I have 3 casual short sleeve shirts I wear with shorts, I live in Texas so shorts are a staple.