That skull looks great! And the internet is so cool for being able to share and download patterns. My first experience with papercraft was when someone (I don't remember who now) bought me this book that had a bunch of pirate ships in them that you could pop out and fold and insert tab A into slot B and end up with pirate ships with little cannons and things. It was only years later when I got into this social media stuff that I noticed the awesome stuff different people were coming up with XD
That boat thing sounds interesting, I've made one papercraft boat around 4 years ago but i fell apart after a year xD