Originally Posted by pinniped
Here's another $0.02... You'll see that opinions vary widely.
((4) Step 4 - If you rent a bunch of cars every year - get Diner's. The rewards are far inferior to SPG Amex, but they do hook you up with primary rental insurance.
If one collects BA miles, the Diner's BA air mile reward (with 50% bonus) would be the same as, or better than SPG, even with the SPG bonus, would it not?
As to miscellaneous spending, the landscape has changed. There is now more than one Master Card or Visa that provides 5% cash back on many purchases including at gasoline stations, supermarkets, and drug stores. With some exceptions, this is probably better than one can do with any hotel or airline card. Just my $.02.