You pass up opportunities thinking that they aren't that good or the lighting is boring. You negotiate with yourself, thinking 'If I see another horse like that I'll stop.' And sometimes you go miles and miles missing the opportunities that will color your trip.
If you were to continue like this, eventually you'd reach a destination and the time would have passed as though you were sleeping. Your memory would be one big amorphous chunk of driving without any details or colors.
A bunch of different wise people said in various ways that the journey is not to be overlooked. For you, the lonely road-tripper, this means slowing down, letting people pass you, and keeping your eyes peeled for that photo op that you can't get at Yosemite Valley or the Grand Canyon; photos that you'll say, "It was somewhere in the middle of nowhere in(insert state here)."
The first photo is always the hardest but after that, they come easier. You know it's a good road trip when you could have made it in two days but it took four.
This photo was the first photo of the trip. I saw the truck and maybe went a half mile before I pulled myself out of the terrain induced lethargy and came back to get the shot. From there I was stopping every twenty minutes.