Do you feel the need to catch them all when playing?

I've completed the Pokedex enough times to not care catching them all, anymore. In fact, most of the times I play a Pokemon game I just barely manage get a full team of six before the last badge/Pokemon league.

It depends for me really. I ended up doing it in a few of my games, Fire Red when I was a kid (which ended up paying off since I got to explore all of the cool post game) and I also completed it in X and Y in order to properly shiny hunt. For the most part however, I don't care as much now and mainly capture Pokemon I want.

No but I do feel the need to take them all out.

I feel that with every Pokemon game, I become increasingly less motivated to complete the Pokedex. The overall sheer number of Pokemon for me makes it an uphill climb especially if you've never really completed a Pokedex before. x.x

So I just... really don't bother.