My girlfriend and I are on vacation in San Fransisco the last week in July this summer and would like to hear where it makes most sense to stay in order to have good connections to move around with public transport or by foot.
We don't have an exact plan yet what all to do there, but would like to hear if there are things we should consider when deciding where to stay.
Please also mention if there are parts of the city we should avoid and why.
Thanks in advance!
EDIT
I'm not asking for specific accommodation recommendations, but rater some information whereabouts to look and which areas to maybe avoid.