Play with hats that have unique shapes and don't be afraid of color. A masculine shaped hat, like a fedora, can still be a fun choice for any girl if the color of the hat is bright and bold. Floppy hats are huge especially for spring. And, now formal hats aren't just for church. Try accessorizing a feathery formal hat with your outfit on your next evening out.
Caps can still be trendy if they have a fun pattern on them and there is no harm in sticking to the classics like a basic driver. Guys can have fun with color as well. Try adding a colorful hat that contrasts with the rest of an outfit to really make it pop.