My hobbies change every year... currently my hobby is in investing. Which is why I seldom have time to ob nowadays. My weekends are spent on reading annual reports..
Past hobbies include:
1. Pets (dog, birds, rabbits, guinea pigs, hamsters, cats, sea monkeys, fishes, quails, and chicken)
2. Plants (terrestrial and aquarium plants)
3. Chemistry sets
4. Avian incubation
5. Motorbikes
6. Outdoor activities - rollerblading, windsurfing, mountain trekking, jungle trekking, racers.
7. Canine psychology
8. Lego mindstorms (robotics)
9. Bioinformatics
10. Wine collection
11. Stamp collection
12. AI/Expert Systems/Data Mining
13. Cryptography
14. Archeology
And other unmentionables...

[80% Steve, 20% Alfred] ------- Probability of Clear Skies = (Age of newest equipment in days) / [(Number of observers) * (Total Aperture of all telescopes present in mm)]