I just completed the Bunker quest. The best part about it was the ending, where there's a big dramatic cutscene that happens within arms reach of your character and you just stand there and do nothing. Even better was the fact we completed it with 4 of us all playing as different classes, so it all happened within arms reach of a Maya, Axton, Salvador and Zer0, and the 4 of us didn't even attempt to do anything about it lol.
Also at level 21 I used one of my 3 keys and opened the golden chest, got a shock SMG that has 64 bullets a clip and does 204 damage per bullet, and can be burst fired or fully auto. Even a few levels later it still ruins everything.