Based on my own experience and your profile I would recommend the Amex Blue Cash Preferred for the 6% on all groceries and streaming. You could also use it for 3% on gas if you like. I wouldn't worry about the annual fee too much. I have this card and had to pay the AF in year one and I've easily made that up and far surpassed it early on in my first months of having it.
I'd also consider using the Discover It card and the Chase Freedom card for some wholesale club spend. I know for 1 quarter each year they both have 5% on Wholesale clubs. I know Costco doesn't take Discover which could create a concern. If you're willing to leave Costco and shop somewhere like Sam's Club that accepts Discover you could get 5% minimum on Wholesale clubs for 6 months of the year. Then just use the Citi Double Cash for all the wholesale club purchases in the months when you're not getting 5%.
Discover it also has a quarter of 5% cash back on groceries. So when that quarter happens you'd be getting 5% on groceries 3 months out of the year. You can use this option to help make sure you don't run out of the $6000 per year maximum allotment of 6% on groceries that the Blue Cash Preferred offers.
@cws-21 wrote:My apologies, again. Obviously, I had thought @Remedios meant Amazon Rewards when she indicated "I use AR almost exclusively." Thank you, @longtimelurker, for the clarification. I think I should just enjoy reading this discussion rather than contributing given I am so much off my game today.
No worries, @cws-21, and certainly no reason to stop contributing. 
We use a lot of acronyms around here and it can get confusing... this might help: http://ficoforums.myfico.com/t5/User-Guidelines-General/Common-Abbreviations/td-p/88458
@FormerCollegeDJ wrote:OP - do you use the Discover It and/or Chase Freedom for groceries during the quarters when they have 5% grocery cash back? Between the cards you could usually get 5% on groceries for six months of the year (though I'll note the introduction of the Chase Freedom Flex last year and its accompanying 5% on groceries for the first 12 months for people who signed up for it between mid-September 2020 and mid-January 2021 means it is possible the Chase Freedom will NOT have a 5% grocery cash back quarter in 2021).
Assuming you do use the Discover It and/or Chase Freedom for groceries when that is the reward category, I think the Amex Blue Cash Everyday is your best bet; you could get 3% cash back during the other quarters when neither of the first two cards I mentioned have groceries as a bonus category and/or you've reached $1500 in spending for the quarter. You could then use a different card at warehouse membership stores.
Agreed, this is my method. Just got BBVA CP so that method could change. I see they do amazing target offers
@longtimelurker wrote:
@cws-21 wrote:@longtimelurker, I'm not sure what you mean. Discover It would certainly be better than the BCP if it were uncapped and available all the time, but, since it isn't, the BCP is the better option.
Right, but you said that you forgot the cap and quarter restriction, and I was pointing out that if there wasn't one, you still wouldn't use the BCP (as you did in your calculation).
And it's worth remembering there are other 5% solutions. Most of my grocery spend is at WholeFoods, so the uncapped free (well, with Prime membership which I would have anyway) Chase Amazon beats the BCP. And, if your grocery store is one of the Albertson brands (Albertsons, Safeway, Vons, Jewel-Osco, Shaw's, Acme, Tom Thumb, Randalls, United Supermarkets, Pavilions, Star Market, Haggen and Carrs) or Ahold (stop and shop/giant) you can buy gift cards on Amazon for an uncapped 5% with the Chase card.
Any adult learners that have a .edu email address, you can get your prime membership for half price (student prime)
@Jordan23ww wrote:Based on my own experience and your profile I would recommend the Amex Blue Cash Preferred for the 6% on all groceries and streaming. You could also use it for 3% on gas if you like. I wouldn't worry about the annual fee too much. I have this card and had to pay the AF in year one and I've easily made that up and far surpassed it early on in my first months of having it.
I'd also consider using the Discover It card and the Chase Freedom card for some wholesale club spend. I know for 1 quarter each year they both have 5% on Wholesale clubs. I know Costco doesn't take Discover which could create a concern. If you're willing to leave Costco and shop somewhere like Sam's Club that accepts Discover you could get 5% minimum on Wholesale clubs for 6 months of the year. Then just use the Citi Double Cash for all the wholesale club purchases in the months when you're not getting 5%.
Discover it also has a quarter of 5% cash back on groceries. So when that quarter happens you'd be getting 5% on groceries 3 months out of the year. You can use this option to help make sure you don't run out of the $6000 per year maximum allotment of 6% on groceries that the Blue Cash Preferred offers.
Chase Freedom 5% wholesale clubs started April 1😀. Been stocking up at Costco already!