One thing I love biking (I bike everyday as I commute with a bike and also usually bike randomly in the street for fun) is biking is fun both slow and fast. There is something very appealing about biking as fast as car, almost like showing off your muscles to the driver. Biking slow is also fun since it requires a lot of balance. Sometimes I try to bike as slow as pedestrians. At that speed you really need to balance yourself as even the slightest perturbation can cause you to speed up in order to rebalance. It's very calming, refreshing and relaxing once you figure out how to bike that slow.