I like to cycle very much. When I was child I cycled each day of my school holidays. When I became older all my friends moved to scooters, but I didn't. Scooter was good and I like it too, but bike is something different. You start to cycle at 3-5 years. Your bike has small additional wheels. You learn to poise on 2 wheels. You change 3-4 bikes during next 10 years... It's whole life when you are child.
I didn't cycle around 15 years. Last grades of school, university, job, my own family... But 4 years ago I bought my bike and friend of mine and I cycled whole spring and summer in Georgian mountains. It was great time. My personal record is 116 km per day. Difference between altitudes at that day was 1100 meters, from 450 meters above sea level till 1550 meters above sea level. Yes, I was died at the end of the day (and week after), but it was great day!
Now I have problems with free time again. But sometimes I cycle with my kids in park. When they become older, we will ride in mountains. It's real pleasure when you cycle in mountains, it's hot, you are tired and you see some mountain river with icy water. You enter into this river and feel yourself like you born again - no problems, no heat, no tiredness...