There is a lot to explore and do in this world, but I think it is also nice to have a place to return to from time to time.

[Where else are you going to keep all your books? These are the important questions in life.]

And if you have a place like that, you could leave the pokemon you can't bring with you there. Then they'd be able to run around freely while you are gone. That's what I do with my Wailords. I never put them in the PC. I just let them swim freely out in the ocean. They've even picked up a wild friend out there.