I love Deku Palace and Tal Tal Heights and Molgera Battle and Dragon Roost and a lot more
Oh yeah, and Stone Tower is also one of my absolute favorites
No of course not. Whenever someone dies from old age, it is usually due to failure of an body system or some kind of sickness, but since the Kokiri are eternally young, it would be impossible to die naturally.
The darkness in TP and MM were excellent and well put-in, and Nintendo would do no harm in making more. In fact, the Wii-U Zelda looks pretty dark as well.