The best romantic dinner in the Mission
Agree with Foreign Cinema and Range.
Woodward's Garden is small and cramp, plus the location and neighborhood (next to a freeway) is less than romantic.
Bar Tartine is a good restaurant, but a popular and noisy place is not exactly romantic. Difficult to have a conversation.
Perhaps consider a new place: Commonwealth.
842 Valencia Street, San Francisco, CA 94110
2534 Mission St., San Francisco, CA 94110
561 Valencia Street, San Francisco, CA 94110
1700 Mission St, San Francisco, CA 94103
2224 Mission St, San Francisco, CA 94110
Hmmm..."romantic" can mean different things to different people. For higher-end, nicer places, all the suggestions here are great. (Well, I haven't been to Woodward's Garden....) Also, Bar Bambino and Limon also fit along these lines. If you're looking for something with a bit more edge and youth, you could also consider Lolo's, Front Porch, Spork. Also, Nihon could be worth a visit.
The Front Porch
65 29th St, San Francisco, CA 94110
2931 16th Street, San Francisco, CA 94103
1058 Valencia Street, San Francisco, CA 94110
524 Valencia St, San Francisco, CA 94110