If you want a real OB experience I encourage you to book this AIRbnb. It is in the perfect location and has everything you want for an apartment next to the beach. For me personally, I loved to be able to walk to the beach every day to surf. I kept my boards in the back patio. Also, having dedicated parking is key for this wonderful beach stay. I recommend going to Wild Things pizza (two blocks away) for a slice and a beer/soda.
You can walk everywhere. No need to get in the car unless you want to go outside of OB and explore San Diego. It was just not a vacation for me, but I was able to calm my mind here and enjoy the sun and beach.