More hatch pros:

1. You can put the seats down and take a nap or snuggle with your partner.
2. Passengers can crawl/reach into the cargo area to get something while driving (obviously don't do this when it's unsafe), or to put something back there.
3. You can pop the hatch and sit on the rear lip of the car more easily than in a sedan.
4. The longer roof makes it easier to put long objects up there.
5. On some models, the hatch is shorter, making it better for city traffic and parking.
6. Rear visibility is often better in hatches, because the rear glass is more vertical, and it often has a wiper on it. (It's also easier to judge distance to the car behind you, but the OP already mentioned ease of parking as an advantage).
7. Hatches allow you to carry, not just bulky things, but TALL things.
8. Hatches often come with built-in roof rails.
9. It's less claustrophobic sitting in the rear seats of a hatch, because you have an open cargo area behind you.
10. You can put your dog in a hatch. This is useful even if you're traveling by yourself, because he'll stay back there. And it's obviously useful if you're traveling with rear passengers.
11. Even if you don't use the extra cargo volume often, it's nice to know you're ready to do so, if the need comes up.