I've eaten a lot of Thai in SF over the past 8 years, but overall, my favorite is Little Thai on Polk and Broadway. Yesterday I got takeout-#38 Hot Beef with Bamboo Shoots, and #28 Seafood Curry. Both were just outstanding. The flavors in each dish the place serves are exceptionally complex.
Khan Toke (Geary) is of course #1 for atmosphere, and Marnee Thai (Irving) is very good too, especially the Chan Pad Poo. And Osha Thai (Geary downtown) is great for quick noodles.
Ok, anyone else?