At some point, nice is subjective. And Mission definitely has some sketch spots. But Castro, Eureka, Noe border it and are even nicer; then there's Hayes and th

At some point, nice is subjective. And Mission definitely has some sketch spots. But Castro, Eureka, Noe border it and are even nicer; then there's Hayes and the Haight and Alamo Square; head west on Haight and you get to Cole Valley and the Inner Sunset; north of Haight you'd hit a few patchy blocks on Fillmore but then come to Japantown, Pac Heights, the Marina. And that list is not even close to exhaustive: the point is that there are large contiguous areas that are nice, walkable, and safe.