A ludologist is a person who studies games.
Ever since I can remember I've been fascinated by play and how humans use play via games for cognitive development and leisure alike. There is an emerging field of academia that focuses on the cultural, social, biological, technological implications of modern video games. Luminaries such as Ian Bogost and Jesper Juul are highlights. However, formal games are around 5,000 years old, it seems, and a great deal of work is yet to be done to map the territory of games against history and evolution.
What does that have to do with the modern multi-billion dollar game industry? The intense development that's occurring around mobile, online, social, free to play, etc. in parallel to the bar-raising as games tell better stories and become culturally relevant works of art is incredibly exciting.
There's no industry I'd rather be in - I'm a lifer!