Ask HN: What are some fun things to do in the bay area?

I'm trying to decide whether or not the bay area is a place I could live. When I interned there last summer I didn't have a car and lived in Sunnyvale, which made things pretty boring. If I were to move there I'd probably try living in SF, but in general I want to understand why people love this part of the country so much. I feel like I missed the experience that makes others enjoy it.

I'm currently contrasting the bay area with Seattle, and the argument I always hear is the weather and difficulties finding a job in one place over the other. But I figure there has to be more than weather and work!