Having used graphael (really the only graphing library I've used), I can say that I like it, but I don't love it. I like how the charts looks far more than any

Having used graphael (really the only graphing library I've used), I can say that I like it, but I don't love it. I like how the charts looks far more than any of the other graphing/charting libraries, except for maybe highcharts. Imo, one of the key features that sets graphael and highcharts apart from the rest (especially the Stanford library, which looked very nice, except for this one feature) is interactivity. I think being able to mouse over the data points and get more detailed information is a massive leg up. From an end-user perspective, this interactivity is what @briandoll referred to as "function", in addition to the "look", which in this case, is great for both of these libraries. - $0.02