Originally Posted by JohnnyBekkestad

Any of the east coast bases are going to be similar when it comes to upgrade times.
DTW-ORD-MSP-ATL and even DFW will be the most junior, there has not been much movement into ATL in a very long time.

ORD is the biggest domicile, with travel benefits on DL, UA and AA (As well as DFW).
Any of the other ones will only be UA and DL.
Im in ORD and i fly mostly on AA 700.
QOL is going to be different from person to person.
Depending on where you live you might not be able to get to a certain domicile in time for a show time. Or get home after a trip. And now you just lost two days off. Best is to live in base.

When i started at OO, i was based in DTW and living just outside West Palm beach i hated my commute. I could fly over to Europe faster and easier than getting home to Florida.

Then you need to look at what you want to achieve, fly a lot/little. Upgrade fast or enjoy days off.
Do you have family commitments (wife/husband/kids), perhaps you are a single parent in need to do locals or standups. Then ORD is a horrible base as that goes really senior.