Having driven it several times, you will not regret the "PCH road trip" as the views and experiences will stay with you forever. First stop driving south from SF should be Monterey (lot's of good restaurants to choose from) and Big Sur (Big Sur Taphouse is a great roadside stop). About halfway down toward Santa Barbara is San Simeon and Hurst Castle if that interests you. Definitely stop in Santa Barbara to walk the downtown area and stretch your legs and lots of shopping and dining options. Not much further south is Ventura which is often overlooked but worth the stop. Next is Malibu with nice scenery
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of all varieties, if hungry stop at Lily's for a great burrito. Followed by Santa Monica, which used to be great shopping and the pier, but now not so much, and/or Beverly Hills if you choose to make the short drive over just to say you did. For my money, Orange County and Laguna Beach south of LA is a must and worth your time - great walking, shopping, beach and dining in that area. Make a stop at IN-N-OUT early in the trip so you can hit it again before you leave if you so desire.
Enjoy and stay safe
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