3. You never really escape the feeling that you're not seeing anything you couldn't have seen by car.
Not that I do it, but mountain bikers would disagree with that, and possibly with the 'having to come straight back down the ridge again' thing.
I find i see slightly more over hedges and fences than when I'm in a car, as I'm that bit higher, but also the pace is perfect - in a car you zoom past everything, walking takes forever to get to a new scene, but cycling you could look around you every minute and get a different view on where you are, and after a few hours you've been through some very different locations but still had time to take them in on the way past.
I hate ice cream shops in Milngavie whose website say they open at 11am but actually they only open at 1pm and you only find out once you've been back to the one across the road again that you thought was the main ice cream shop and found it odd that they only sold vanilla and asked them when the main ice cream shop opened and they said not until 1pm and you didn't cycle all that way again for another vanilla ice cream so you went home without having had an ice cream but when you get home you check the website again and it does actually say they open at 1pm, but I appreciate that may be specific to a very niche group of people.