I've lived in both states. In many ways, California has more to offer: better scenery, better climate, more variety, more recreational possibilities. Texas has more room, nicer people, and fewer earthquakes. Both were briefly independent nations, Texas treasures this memory more than California does.
Texas has no state income tax and licensing vehicles is much cheaper there. Every girl wants to be a cheerleader and high school football is almost a Texas religion. Generalities like this about California are much harder to come by. Both states have vast, complicated systems of public higher education. I've worked in both.
Because of jobs, Texas is rapidly gaining population. California is losing people slowly and would be losing rapidly if it weren't for the inflows of immigrants from other countries. Government seems to work in Texas, seems not to work well in California. Go here to see a New York Times article about these issues, as viewed from the left.