While I do have more bikes, there are 3 that I do 99.9% of my riding on. I get most of my riding in on a Canyon Endurace...I've got a pretty agro set up on it, so it splits the difference nicely between comfort on long rides, yet still feeling "racy."
I used to race XC mtb, so my other commonly used bike is my Spesh Epic. Only 100mm travel front and rear, it's perfect for long distance mtb'ing or less technical riding. It's fairly light for a FS mtb bike.
My 3rd bike is my Canyon Strive. It's my go-to for technical trail riding, 160mm travel, 29" wheels, etc. It's perfect for some of the granite boulder infested trails up in the high country.