California is BEAUTIFUL!!!!
My boyfriend is from CA, so I've been a couple of times. We are going again in August.
If you're going to San Diego, you MUST visit the nearby town of La Jolla. It is the most beautiful place I've ever seen. I've looked up pictures of La Jolla on the internet, and none of them actually do it justice - You have to see it in person. The sunsets there are gorgeous... I can try to find some of my vacation pics if you like and I could send them to you.
We also visited Universal Studios - I didn't think it was all that great.
I love southern CA - I could live there. LA is nasty, though, just to let you know in advance.