The following things are of interest to me both professionally as well as privately:

• medical informatics with focus on applied and formal ontologies and Semantic Web technologies for knowledge modeling and representation
• medicine (particularly oncology, emergency medicine and pain medicine as well as clinical/biological psychology and neurology)
• software design and development (at the moment in Java and a little Groovy and PHP)
• support of open-source software projects (member of NetBeans, Java Community Process (JCP) and OW2 (ObjectWeb))
• computational linguistics and in particular natural language generation
• design of (web) user interfaces, graphic and object design as well as architecture
• supervising and tutoring students in my areas of expertise
• listening to all kinds of music (my favorite is Jean-Michel Jarre) and creating own little tunes and songs (mostly of the electronic and synthesizer kind)
• sports (especially mountain biking, jogging and hiking)