Much the same as I have done on my Windows laptop before, I now surf the web, check emails, mess with photo images, download torrents, and play music and videos. Of course I can do serious stuff too such as website editing, FTP, and remote server maintenance. I can even access the Windows computers around the house to easily copy and paste files.
I have tried numerous Linux distributions before, such as Debian, Red Hat, Slackware, and Suse. I really like Linux Mint. If you are considering giving Linux a try, definitely give Linux Mint a shot first. It even comes with choices to give it a different look and desktop functionality.