Hi Flower, yup I think you made a great choice by ordering gold on gold. It's a natural color that goes with everything, and even more a plus if you usually wears yellow/rose gold jewellery instead of white gold or silver. As for the answer to which color is the best if for the first and only birkin... I must say I'd buy a black one if I could only have only one ever. Although black is not my fave but it's so versatile and stain-resistant! I have a Black birkin 35, and once I spilled a little bit of coffee while holding it!!! I panicked and immediately went paranoid (of course) but after quickly wiping it with damp soft cloth, I couldn't see any stain! I was SO relieved! Imagine if it were another color that's lighter... But then again, that's just my personal opinion. And if given a chance to own a Birkin, any color, who wouldn't be tempted??