I loved the game Portal 2 for its gameplay, story, and especially its writing. One of my favorite bits was the Space Core, a computer personality who was fixated on space.
As a sign of my unhealthy fascination with the Space Core, I spliced a number of its lines together into a 30-second sound file that is suitable for being a ringtone. Now your phone can talk about going into space! You can grab either the mp3 file for Android or similar phones or the m4r file for iPhones.