I interviewed at most last year (not at Pitt, UC, or Stanford). Overall my list would be:
1. BIDMC - Nice people, well rounded program, harvard affiliation, Boston is a pretty nice place to be
2. NYU - Incredible location in lower manhattan, friendly program, great clinical experience, private and public hospital experiences next door to each other
3. Stanford - Great reputation. SF is amazing, but Stanford is pretty far removed and very suburban environment. I have an urban east coast bias, bump it up a couple notches if you're looking for west coast.
4. Northwestern - Beautiful hospital, awesome location, but it is definitely more of a workhorse mentality program. Residents seemed happy, but also tired -- I interviewed with PD, and was very open about maxing out on work hours (to his credit, he was happy that the residents were no longer going way over work hour maximums)
5. UWashington - also have reputation for working very hard, hospitals are spread out and it's a big program. PD was really nice and seemed to be resident advocate, but made note that trying to change the culture of a big program is like "trying to turn a battleship."
6. Penn - I know someone going here, he tells me they don't have CRNAs. He viewed it as a positive, I view it as a negative -- it sounds like the residents become cheap labor (chair sitters) in some cases. Has an awesome reputation, but I find phili to be kind of sketchy (The only time I've ever been mugged as in phili, so I'm very bias against the city of philadelphia)
I don't know anything about UC or Pitt, so I'm not including them on my list.
Based completely on location:
1. Northwestern - Beautiful hospital in downtown Chicago, great neighborhood with a supririsingly reasonable cost of living
2. NYU - best location of any hospital in NYC, very safe livable neighborhood, and you can do anything you want in lower manhattan
3. UW - Easy access to Seattle, on a beautiful campus overlooking the cascade mountain range. Bring an umbrella, but temperate winters and fun city with lots of outdoor things to do.
4. BIDMC - it's in Longwood, so it's removed from downtown boston but easy enough to access. Boston is a great place to live, but is a quaint college town compared to NYC and Chicago.
5. Stanford - SF is great, but palo alto is pretty far removed from the action.
6. UC - access to chicago, but neighborhood is kind of sketchy
7. Pitt - I hear Pitt can be fun, but I've never been personally
8. Penn - ha, I guess I'm just really not a phily fan.