Patterns

I spent lunch with my little brother and a friend and I took the opportunity to draw (something I don't get much chance to do lately). I really like these turned out and would appreciate any comments. I was motivated by @visothkakvei (Instagram) and wanted to try my hand at the pattern concept. It's turning out well, I really like it. I made my own flourish with the skulls and I have a few other ideas as well, so we shall see... Any opinions?