It is possible that if you have discovered Portal 2, you have discovered it because you are really interested in puzzle games. This game came out in the year 2011 and a lot of people liked it immensely. While there are some people who like the original game better than this game, there are also those who appreciate this game more because of the differences that it has over the first portal game. The fact that you like this game probably means that you like to place it as your computer's desktop and there is nothing wrong with this at all. Place it as your desktop's background and keep playing.