Up to last year I had six personal cards. I've since canceled three and each time asked if the credit line could be transferred to another card. I use my Freedom card as the "storage" account for the credit line so when I ever have to shift around credit for a new card I pull from that.
Right now I have Freedom, Hyatt, and CSP. I recently canceled UNITED Club, MP Explorer, and Marriott.
I've previously had IHG (when it was Priority Club) and plan to reapply if the bonus is increased. Sitting on getting the British Airways as well.