HI and CA of course look the worst. I'm sure some of the others work out to a pretty low rate of a couple percent for a modest income.
Why would CA be one of the worst state once you reach FI for taxes?
Because CA has a top state tax rate of 12.3%. I have no idea what the brackets look like though, but unless it's extremely progressive it doesn't sound great (and CA is expensive as well)
I would consider CA to have extremely progressive tax brackets. Assuming taxable income of 20k in 2014, the CA tax would be less than 1% of that amount. Totally failed to think about the cost of living though...