I have always felt that 280 is the most beautiful freeway in the world, of any I've been on.

And I do appreciate the road itself too. Sweeping constant-radius curves, wide smooth asphalt, great grading. Although it's not as fresh as 10 years ago, it is still one of the best built roads, in addition to being surrounded by gorgeous beauty. The engineering is why so much traffic can drive so fast.

That said, I usually take 101 since I live on the east side of SF and most of my destinations are next to the bay. It just makes 280 more of a treat when I do take it.