I think a lot of people who play this game too hard are the ones hurt the most when they can't find something they want/something runs from them. Yesterday I caught my first Magmar and I was very pleased with myself. I'm barely at level 9 (don't even have great balls yet), but that Magmar is one of my best catches so far. I'm only a casual player, but based on how some others play this game, I feel like I am having more fun that people at level 20. For example, I overheard this level 18 lady at the park saying she had been playing since 3 in the morning looking for a Dratini, and she looked extremely exhausted and frustrated. That type of mindset, imo, is what takes the fun away from playing.
For some reason, people dislike the fact that PokeVision is down, which means now you actually have to go outside and explore and see if you can find anything...isn't that the original premise of Pokemon GO?