I agree! I was requested by DD to find a couple of plain green T-shirts for the girls to wear when performing in a school production (caterpillars!), and I just could not find a single plain T-shirt for girls. After a tip-off from another parent I ended up buying boys T-shirts in a rather pale green - saved the day, but so frustrating!
I refuse to walk around wearing a top covered in hearts or glitter! I have a T-shirt I wear in the garden which states "Still Glamorous", but I wouldn't go to the supermarket wearing it! 