What do you all think about this EQ chart

Hehe, it's probably the most contrary chart to my experience I've ever seen. Apart from that, it's either too broad or too detailed, as you like. Useful charts should use ranges, and simply describe the character of a given frequency spot. Or they should give concrete hints for specific instruments – but this example is pretty useless, even counterproductive, me thinks. And still: one EQ is not another EQ. Boosting 16k with a Nebula Pultec sounds totally different from boosting 16k with ReaEQ.

It's probably fine as a starting point, but there's acoustic and electric instruments which don't follow the same frequency ranges, and have different emphasis in different areas of the spectrum. I don't think you could have just one chart that say it all. Bass drums and Bass guitars IMO are all over the place. Vocals (male/female) probably can't even be usefully placed on a chart like this. I have one for orchestral instruments that I've used for a long time, but even that chart doesn't quite nail where to start boosting or cutting.

whatever happened to using your EARS????

The ears have it! The trouble with the idea that a specific frequency will have a specific effect on something, is that the novice will feel obliged to put eq on everything and usually end up with a very messy-sounding mix. Get it right at source and it will sound right in the mix without eq. Even a kick drum will sound punchy without eq, compression etc., if recorded properly. That does not mean that we should never use eq or compression or any other effect come to that, but sparingly and only when necessary. If it sounds good (punchy, full, delicate, whatever) in the room, but sounds less than good on your monitors, go back and get it right before you reach for the eq buttons.

Same stuff....this has been around for ever.

The interactive chart is nice, though a bit small on todays screens :P . The first chart is a good idea, but the details are not well presented. The primary information is lost amongst the secondary. In fact, I'd place the primary information in bolder letters closer to the frequency line and the secondary information more liberally at the outside. So the design can be improved. I certainly love how all the other good EQ charts have risen to the top here :) . Be aware that EQ'ing one region of the spectrum always has profound effects on the perception of other frequencies. Those effects are difficult to put in a chart, so anyone who is studying this for good starting points should start practicing to learn what effects EQ'ing one range of frequencies has on others. You can see this in action in Kennys mixing videos as well.

The only thing most EQ charts or plugins don't have, that I think is a cool feature, is showing the relative note name (in 440Hz equal temperament tuning at least!) in the EQ spectrum.