I'm glad you enjoyed your stay in the sunshine state, except for the "oppresive" gun laws, it is a really nice place.
Next time if you have time try to visit the S.D. Wild Animal Park, it is an affliate of the S.D. Zoo. It is a like hiking in the wilds without actually going into the wilds. If you look hard, you can find a Coke machine for a cold one.
If you enjoyed the Scripps Aquarium you will enjoy the Monterey Bay Aquarium in N. Calif. It is about 3 or 4 times the size of the Scripps Aquarium. The Monterey Bay Aquarium has a website, do a google search.
From San Diego you should try to drive north on the somewhat narrow and curvy Highway 101 aka the Coast Route, it goes by some real spectacular coastline around central Calif. It will add serveral hours more to drive it, rather than go up the inland route on Frwy 5, but it is well worth it.