Well someone has to vote for Butter and I guess that person is me!! I'm not really a fan of the black and gold hardware. I have the Butter hobo and several bags later, it's still one my favorite bags. It's a very lush, rich color and it's surprisingly versatile. I always get compliments on that bag.
i actually have this bag in black, so i'll vote for that color it's a great casual black bag...though one thing i'll warn you about with this style is that it's very slouchy, so that fabulous shape doesn't really stay that way once it's full & being carried. still a lovely bag, though.
you could always order both & choose once you have them to see in person....that's what i'd do
I think that the black would be more classic and versatile; however, I saw someone with the yellow hobo last week and it was TDF! Go with whatever you love and think will work for you. I don't think you can really go wrong here. Good luck and let us know what you decide to do.