My enthusiasm goes to:

IT & Internet
Life Sciences

This is what I'm spending most of my leisure time with. Besides that I enjoy watching good movies and every now and then I play billards.
I'm generally interested in technology, and I'm always keeping myself up to date especially about communication and entertainment electronics.
Last but not least I'm closely watching what's going on at the stock market, as to me money has better places to go than a savings book. Well, sometimes you wish you had left the money there... ;)