My 2 cents, besides product cycles and all that stuff:
(Feel free to add your opinion)
Why people hate Apple Watch?
1. It took Apple focus from the Mac to this gadget and its bands.
2. Is the new Apple baby and they will fight for it and it will have all their attention. And you don´t like the new baby.
3. Apple wants to force it so badly, they even create "a feature in Sierra" that requires you having one.
4. They don´t like the Tim Cook´s Apple.
Why people don´t care about Apple Watch?
1. If you consider a watch as a timeless piece of work that you appreciate even more with the decades.
2. If you wan´t to wear a more unique design.
3. If you like and care about the materials and the complexity of an mechanical, automatic or quartz watch. You know it may not me as accurate as an Apple Watch, but has more personality in it.
4. You like to appreciate the beauty of watch in the wrist of a lady or gentlemen, and not a black screen.
5. Because you cared about your health even before this gadget.
6. Is is square.
Why you people love Apple Watch:
1. As a device, is good for medical health care and monitoring.
2. You like stats!
3. The iPhone you got was too big.
4. You really need to get notifications while your hands are busy and your phone is close.
5. It is just the device for you and you are happy to wear it every day.
6. You bought just because, and now you are not using it, but you won´t admitted.
7. You don´t mind the look of the black screen while you wear it or you think is just fine.