Said it many times, will say it again! Gridania all the way!!!!

Best-looking leader (triggers your protective instinct!).
Best-looking adventurer guild's owner.
Best-looking city-scene and surroundings.
Very nice weather, even thunderstorm!
Easy to navigate in the city, no upper lower level
Playing for long time has least impact on your eyes, because majority is green (lol jk)

I got my bird! But tbh maelstrom bird's barding colour > twin adder colour

So, to join GC, just talk to the NPC at respective town at lv22?
Then do 5 chain quest and it become permanent?

haha yea, i think both maelstrom and immortal barding is better than twin adder..but nvm i will be using my CE behemoth barding anyway

Too many red barding around. Basically, most ppl joined Maelstrom just for that

Yellow Serpent is the coolest in town

I got my bird! But tbh maelstrom bird's barding colour > twin adder colour

Not bird, is chocobo!!!

Not chocobo, is chocobro 

I don't care about consequenes, I just answered "For Kan-E-Senna!!!" haha.

Serious answer: no, it doesn't matter, except that you see different text based on different answer.