Board Thread:Lore Discussion/@comment-24098614-20150903093108/@comment-25350022-20170621120244

From a gameplay aspect, neither side really provide any benefit that'd make it hard for you to decide which one you want to join more.

From a roleplaying aspect, it's entirely up to the player.

I like the Blades because they're exterminating the Sky Serpents who would sooner see Tamriel burn to a cinder, rather than to live peacefully alongside mankind. Meanwhile, the Greybeards up on their mountains spout riddles about how "Dragons are part of the natural order of things..." or some such crap, and would allow them to continue destroying the surface world down below.