I am an OCD fueled collector that constantly feels the need to organize his collection of cards, games, and yes Pokemon, in different ways. I mentally organize my collections whenever something new is announced to accommodate the new acquisition
Said collection is now impossible to complete in-game, and will never come back.
The joy I get from Pokemon comes from starting at 0 and giving "Missions" to myself to go get a new Pokemon until the National Dex is done. I spent hundreds of hours doing just that.
What's so hard to understand?