Good site and Happy Birthday
Just as constructive suggestions,
* Consider Styling all your pages with a single CSS file and try not to do styling per tag (for example, the background and button width are different slightly from 'home' to 'about me')
* Extra's section might want to make all the links have the same style (the styles seem random)
* On the top buttons list, the 'Contact' button wraps around to the next line (In Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4)
* Make sure to run the site by
http://validator.w3.org/ to validate source, making it compatible across browsers. Since all the pages are static and styling differs from page to page, seems like you will have to validate each page individually.
Validate Now
Keep up the good work.