I'm happy I opted for Graphite. It goes with any case combo which most people will be using, looks really nice in the videos and pictures I have seen. Plus is a neutral option when it comes to re-sale later down the line. Not that you buy a phone to worry about selling it again, but you have to at least give it a passing thought unless you plan to trade it in and loose money each time.
Pacific blue is really nice, and was my second choice but I didn't want the blue camera rings looking weird with certain coloured cases. After seeing it in these videos and pictures, it wouldn't have really mattered as it's not so noticeable but still, I am happy with the choice I made.