I feel like my card lineup is complete also - if anything I'm waiting until end of year to start closing a few accounts and trying to consolidate others. The ONLY temptation as of late is to get a Sallie Mae for gas, but I have a Freedom and IT card, plus my BCP for non gas quarters. So it's unlikely I'll actually go for it. I'm pretty much covered as follows:
Amex BCP - 6% Groceries + Backup Gas card (plus the various Amex Offers are nice too!)
BOA Travel Rewards - 2.25% General Spend card
Chase Freedom - 5% rotating
Discover IT - 5% rotating +2% CB until next summer
Citi Dividend - 5% rotating
Citi Forward - 5% restaurants/movies
Target Redcard - 5% at Target
FNBO Amex - 1.5% CB - I got this on a whim as a "just in case" card, but honestly I don't revolve a balance so it doesn't get much use from me other than small sub-$5 transactions
To be closed:
Chase Slate
Gap Visa
Lol to echo jfriend, now I just need to marry someone with military affiliation to gain access to USAA/NFCU rates/LOC! 
I have my needs very well covered. I have wants, but then most do. I will not apply for credit just because of want though. 
Not mine.
I've been working on paying down balances for 7 years now. No negatives ever, just a lot of open balances to take care of.
I've gotten some cards a while ago, such as Cash+ and Delta AMEX in 2013, and then started considering other cards a year ago. Joined here, and got the Diners Club card, and have been finding out where I stand with my credit.
Earlier in 2015, I got my first auto CLI with B of A after balance chasing CLD's over the years.
Got approved for two co-branded Chase cards in December and January, after balance chasing CLD on all accounts, and several closed.
Got approved for Citi AAdvantage a few weeks ago after balance chasing CLD's and still working on two closed accounts with balances. Until the AAdvantage card, I had only the Diamond Preferred at $1k as my open, active Citi card, and two closed CC with Citi.
And getting approved for the AMEXes is a positive as well.
So I'm only on hiatus as I get familiar with the SPG and AAdvantage, working toward some points levels with those cards, continue to work the owed balances down, and work on a long term strategy that includes getting sign up bonuses, then settling in with regular use cards after the bonuses are harvested. I'm not apping for a while, but I'm lining up what I will be looking for, and trying to figure the best plan for getting bonuses from all the big travel cards I don't have yet in the next 24 months.
