I just mentioned in another comment, we travel a lot

https://news.ycombinator.com/item?id=44583545

We don’t comparison shop. Domestically flights on Delta, hotels are either Hyatt or Hilton brand hotels. Internationally? Most Delta partners (AirFrance, Virgin Airways) or Delta itself.

For Hilton, we get points directly and can transfer from Amex (rarely worth it). For Hyatt, points are more valuable and it’s easy to get points from Chase credit cards (r/churning) that can be transferred to Hyatt (saves us thousands a dollars a year sometimes).

On Delta, we have lounge access, 2 free checked bags, free regional (domestic, north and Central America) flight upgrades, priority check in, etc.