The problem with California, is even though they have better marriage laws, they have worse welfare laws. Women can just have kids out of wedlock and get sent $10,000 per year cash, as supplemental income. In California, instead of forcing individual men to raise kids that are not theirs, they just dump it on the tax payers, so that everyone is paying child support.
If you plan to get married, California is the state to do it in. If you plan to stay single, and are not afraid to ask for a DNA test, then other states are better for you in terms of taxes, though that won't matter as the federal government starts taking all this over.