During the years I changed my hobbies several times. I liked and still like computers, but this already became my profession, or at least is involved in anything I do, so I can not include it in Hobbies.
During my Vienna period, I liked very much gardening, sailplane flying, scuba diving, but especially to take photos with a proffesional camera, and using those for making nice video films about my life in Vienna.
Since in Israel again, I still like taking photos and video clips using my digital video camera, and use them to make video films about my visits and the time with my son.
Flight simulators have been one of my main hobbies since over 25 years. I created new add-ons (photo-real sceneries) for the Microsoft Flight Simulator X - for the areas of the Dead Sea and Haifa in Israel.
An unusual hobby is uranium glass. I searched the world and found many great looking glass items, usually made during the victorian period. I also have some modern uranium glass items, and few Biedermeier-time specialities. In the menu you may select "uranium glass" to see a slide show of some of the items I have now. Note the fluorescence effect when the glass is glowing when put under ultra-viollet light (blacklight).