Leggings are just my complete saviour right now. I always find it had to make that spring transition from black tights to skin colour / bare legs. Or if you've got chubby little legs like me, you may feel that bare legs just aren't an option with skirts and dresses. This is where leggings come in! I'm wearing them with everything and I think they give some girly dresses a bit of an edge too.
I am buying mine ankle length and mid calf length, mainly from Primark but I also have some from UniQlo which have lasted really well.