I know that I am opening Pandora's Box here as there is such a mass of good spots to eat. My wife and I will be in SF next week, and will be staying at Union Square. We are looking for places to eat in the area, walking distance, but of course will travel for not to miss spots. I think that the key words for advice would be: Thai, Vietnamese (pho ga), Chinese, Japanese, Seafood, and Do Not Miss Under ANY Circumstance places.
Thank you in advance for all your replies.