Prop 22 - Neutral. The idea of keeping the state from raiding local coffers when it can't balance its own budget is good, but this may go a bit further than that. I simply have not dug deep enough into this one to tell if it is good or bad. (If you have, feel free to let me know.)
Prop 23 - Strong NO! This is the effort by the oil refiners to halt implementation of California's landmark greenhouse gas law. It is nothing but corporate dirty energy self interest, pretending to be a jobs bill. But it presents a false choice between jobs and protecting our environment. Failing to take action on global warming will cost us far more than taking action. Furthermore, Prop 23 it will damage the ability of renewable and clean energy developers to get funding, by creating uncertainty in state policy. So it will actually harm job creation in the state. Prop 23 is bad for the California businesses that are actually growing, and it is bad for all Californians. Vote NO.
Prop 24 - Medium Yes. This repeals three corporate tax breaks, mostly benefitting large corporations, that the Republicans managed to extract in budget negotiations in 2008 and 2009. It seems like a weird time to be creating new billion-dollar tax breaks for large businesses. (I understand the right-wing theory that says you get more tax revenue by cutting taxes, but it just does not work in practice.) This puts things back how they were before 2008. Businesses seemed to mostly be doing okay then, so this should not do them much harm.
Prop 25 - Medium Yes. This allows the state budget to be approved by majority vote, rather than the current 2/3 vote. Given the embarrassing gridlock the 2/3 requirement has caused, this is probably a good idea. Very few other states require a 2/3 vote to pass a budget. Of course, this also makes it easier to pass a lousy budget, too.
Prop 26 - Strong No. This would require certain fees (such as fees to pay for cleaning up oil spills and toxic waste) to be approved by a 2/3 vote. While increased fees can be a problem, the 2/3 requirement to raise taxes and pass a budget have eviscerated California's infrastructure and education systems, so extending that requirement to fees appears more likely to extend the harm than to solve the real problem.