I always see threads about the best routes, best gym leaders and the best regions in general. So let us settle this once and for all.
Here's the poll: http://strawpoll.me/1707540
BEFORE voting think about the following points:
-Routes, Caves etc.
-Towns & Cities
-Protags
-NPCs
-Gym Leaders & Gyms overall
-Pokemon (NOT the Pokemon belonging to the gen the region was introduced BUT all the Pokemon catchable in that region)
-Villain Team
-Lore and impact of the legendaries (LOL)
-Side quests and stuff you can do freely
-Gimmicks
-Unique places

Also note that stuff that was added in remakes etc. also counts.

Please vote, tell us what you chose and write a short statement why you picked exactly this region.

Have a nice day! :)