Surely this is going to be prone to bias, even if it's only subconscious?

It can be. Therefore it's best to take it with a pinch of salt and decide for yourself. Different requirements will demand for different products. I've seen big enterprises going only for FusionCharts whereas individual developers tend to go for other options like HighCharts. But I took FusionCharts for my personal projects because it was free it had a huge library.

Oh it's got highcharts too. Thanks.