It's too many once it bothers someone enough to make a post about it. 
If you think you have too many credit cards - then you probably have too many credit cards! Someone else just asked a similar question. If you do not need it - and/or you aleady have a sound credit plan that demonstrates your increasing credit maturity and worthiness - stick to it!
“We delight in the beauty of the butterfly, but rarely admit the changes it has gone through to achieve that beauty.”
I don't know: outside of my primary use cards of which there are now 4, if I can't drop a recurring bill on a card to keep it active, I'm losing interest in keeping it open.
Unfortunately a lot of my recurring bills are getting consolidated: internet and phone which were two, both got dropped on the business card, and I don't even know precisely where my Zync and USAA cards are now, and likewise 2% > 1% when we're talking quarterly estimated IRS payments at 1.56% fee or whatever so that use case now gone too off the Zync unless I have a non-trivial tax payment again... first world problem to be certain. Amazon purchase on the Zync occasionally suffices, have to go find the USAA card I guess. iTunes purchases backed by the DCU card so that's occasional use.
Meh, after doing this for 2 years it's getting old: pruned Cap 1, maybe I should prune some more but I'll probably keep them open for future FICO purposes under my theory that a static report is a happy report from an underwriting perspective. Miles to go before we sleep, or something like that.
Or if I'm a little smarter on such things, go create another recurring shipment on a commonly used item from an internet retailer like I did for my BOFA card and my breakfast bar habit. Better solution all the way around me thinks.
