answer:Both are great cities to live in at 35 and both are constantly becoming more and more gentrified but I imagine Seattle is a little more affordable now. It will likely be more gray and rainy although SF is often foggy. Can you go up there for a few days and check it out? If not, go online and look at rental listings, music venues and performances, etc. I know the housing market in SF a bit and it is really, really expensive to buy a house almost anywhere in the Bay area. If you’re interested in the dating scene in each or just making friends activities, look at dating sites in each area and also check meetup.com for affinity clubs. Each has beautiful outdoor opportunities nearby. What a lovely decision to have to make!