OH, the memories! I've been doing professional photography for over 25 years at all the beaches in and around those areas.
I like the bike in #1--it just needs a better environment with a cleaner background.
Really like #2 and #8--I have a thing for long skinny formats!
Hey, you need a much better beach to practice your craft. Two words--NATURAL BRIDGES. It's by far the most beautiful and diverse beach in northern California (I know--I've shot at most every beach in northern California down to Santa Barbara).
In fact, if you have access to that bike again, take it to Natural Bridges and place it along side the road down to the beach. On the left, just beyond the toll booth where the old split-rail fence is in the background--take a look.
My lab is over there too. I've been using BAY PHOTO LAB since 1988. Really good lab; great people!