Cascading Style Sheets
I started learning CSS the same time I was learning HTML. I enjoy writing in CSS as I love the graphic design side of applications. I like frontend more than backend, but I like a mixture of the two because pure frontend can bore me sometimes, and pure backend can irritate me sometimes.
The projects I have made with CSS are the todo-list, ERC20 ICO Crowdsale. I have also made a static frontend that I did not put in the projects sections as they don't hold much value. They were mainly for practicing CSS.