Fully agreed with Forgotmyoldpassword's "best bits" above, though for me it's the view from my tent when I rise in the morning - just grass, rushes, rocks and maybe a few sheep, as far as I can see all around. No houses, no people, no cars. For a suburbanite like me it's awesome.
The best part of any of my day walks can vary from one to another. It might be a panoramic view, an enchanting wood, pretty cottages, a pub, exchanging a few words with a pleasant stranger or unfortunately on some occasions simply the moment I get back to my car.
Yesterday's walk will be remembered partly for finding a group of wild stinking hellebore, Helleborus foetidus, with blooms just opening, but more so for the timid little dog that came yap, yap, yapping from a farm just as I settled myself down for my lunch. He was clearly frightened of me but I won him over with bits of sandwich. Before long he was sitting at my side and then rolling over to have his tummy tickled. I was so grateful to him for sharing his company with me.