If I didn't live in Seattle, I'd probably live in LA, but only if I afford living in the good part of LA. I have family in Brentwood (near Beverly Hills)... I'd dig living there.
Living in the heart of Manhattan always seemed appealing to me, but I have a feeling I'd get sick of it. Again one of those things where being rich in Manhattan would be very different than being poor in Manhattan.
I've visited Hawaii many times. Kauai is my favorite of the islands. I've thought about what it might be like to move there or retire there. I met a couple who were from the mainland who had recently quit their jobs and moved there to open an Ice Cream shop. They seemed really happy, but I think there's certain aspects of Island life I'd end up hating. No sports teams, concerts, etc. My GF's family lives in Honolulu. I like visiting there, but I don't think I'd want to live there. Lots of poor areas, limited entertainment options and a large percentage of the population there has an underlying dislike of outsiders.
Seattle is pretty wonderful. Our winters can be wet (not downpours, just consistent sprinkling), but our summers are fantastic. Pretty much everything you'd want to do is available here. Not a bad option.