My wardrobe is just tons of button-up shirts in various patterns, plain shirts to wear underneath (t-shirts, or if they've got sleeves I'll do them up), usually very colorful or darker brown for when I want to stand out less, but no black.
And ye olde jeans of yore of course. Also got some cheap sweatshirts and hoodies but I don't use that much, they look boring on me.
I'll use accessories on occasion, like rings, bracelets, scarves, and various kinds of gloves. My trademark used to be wearing bandanas tied in a headband configuration. Both as a fashion thing to add more color to my outfit and as a practical choice to keep hair out of my eyes when I had a longer cut.