I used to go to San Francisco pretty frequently. It’s a beautiful town and great for exploring on foot. There are some great restaurants and the burritos in the Mission taquerias are truly a regional treat! A hike up to Coit tower is very picturesque and a stroll along the pacific coast to the seal rocks is very peaceful. People there can be a little nutty, but as long as you don’t try to forge close relationships with them, it’s a great place!