William Riker is a character on Star Trek The Next Generation. Apparently he sits weird, and it's been named the "Riker Chair Maneuver". I never noticed it while watching the series, but
In my entire life I've only ever seen three snakes in my home town of Prince George. The first time was a young boy. I found a garter snake in the yard. I was astonished, because I didn't think we had snakes this far north. The only reason I recognized it as a garter snake (assuming I identified it correctly :P) was because I had seen large packs of them before while traveling.
Both Wordpress.com and Blogger provide a free subdomain for your blog, but if you want to use a custom domain (meaning a domain you've purchased elsewhere such as "example.com") Wordpress.com requires you to upgrade
Both Blogger, and Wordpress.com have official themes you can install, but Blogger's are very dated looking. If you want thirdparty themes you can install them directly through Wordpress.com. Blogger on the other requires you to search the net