I am also in the process of leaving the Nook behind. The ecosystem and features are just lacking too much. OTOH I will never leave an eInk device to go tablet or phone. eInk devices are so superior to reading on a tablet that it isn't funny.
- Battery Life
- Screen timeouts are for the reader not the power saving.
- Sunlight
- Eye strain (a real issue for me)
- easy of transport and durability.
- the lack of distraction
I have the first gen 3g nook, and nearly every platform since.