I especially love this corner of the room. It is what you see when you walk in the front door. I took pictures of meaningful things to my brother-in-law (such as his street's sign, his company's logo on his truck) and then hung them in Ikea frames. I also love the ceramic horse head on that little stool, which eventually got moved to the mantle.
There are some nautical elements going on, but I wouldn't call it a themed room.