I don't want to use iPhoto, because I use iPhoto for family photos, and Aperture for professional photos. So for me, that's ruled out. And I hate Adobe's Cloud software premise. I just want to buy software and own it, not "rent" it with a monthly fee, that if I stop paying, I lose the software (and am in the same situation of having to migrate).
I like Aperture, I wish it wasn't going away.