There is no one answer to that question. It's been asked many times here, and the answer is always: it depends. It depends on you, if you feel overwhelmed by having so many cards, or if you simply want to cut down.
By the way, closing your oldest cards wouldn't hurt your AAoA. They'd still remain on your reports for up to 10 years if they're closed in good standing.
tldr answer, I'd close them.
Long answer, I am not aware of a number of cards that is "too much" in FICO scoring. The FICO considerations I am aware of are: 1) will closing the card cause your overall utilization to increase significantly; 2) will closing the card take you below three open bank cards. Two other factors, not FICO but meaningful in the world of credit, are 3) will closing cards annoy the lenders of those cards for some reason, for example, by making you look like a churner if you recently cashed in on SUBs; and 4) would leaving that card open be useful in the future, for example, could it be product-changed to a card you'd rather have.
It sounds like the cards you are asking about are "no" in all four of these questions, so, I would close them.
As Aim High pointed out in another thread when I gave similar advice 
Closing them will affect your account ages one day, roughly the year 2031 in this case, about ten years in the future, when the closed accounts fall off your credit reports. That COULD matter in some situations. But in this situation (and in most situations I see on this board), I don't think it's worth keeping cards like this around for this. You will still have plenty of cards left to maintain age of oldest account and average age of accounts. JMO.
I would make two piles, ones IknowI want and ones I would close if there was no penalty.
Then close one out at time every few months or so and watch my scores.GL!
I've closed 12 cards in my life and looking back on it I don't regret closing a single one of them.
I think it is a personal preference really. I know for me I like things slim and trim, if anything in my life stops serving a purpose I will likely try to get rid of it. I just don't like a lot of stuff around in my life that I'm not using.
I think it feels good to drop cards you no longer use, almost as good as getting a new card, but not quite.
@digitek wrote:I've closed 12 cards in my life and looking back on it I don't regret closing a single one of them.
I think it is a personal preference really. I know for me I like things slim and trim, if anything in my life stops serving a purpose I will likely try to get rid of it. I just don't like a lot of stuff around in my life that I'm not using.
I think it feels good to drop cards you no longer use, almost as good as getting a new card, but not quite.
Agreed, for my part, three is starting to get annoying, I'm thinking anything more than five would qualify as "too many".
