4 pillows and 1 decorative pillow. If it were up to me I would have new pillows all the time! But it drives my hubby crazy.
We have two- one for each of us to sleep on. My husband really hates decorative pillows, so none on the bed or couch. My daughter on the other hand has like 5 or 6 on her bed.
8 - 4 king-size (2 previously for sleeping, but now DH sleeps with none and for neck issues, I switched back to a standard size which goes in the closet when not sleeping), and 3 decorative (currently room torn apart so no photo ). I would do seasonal bedding like in my kitchen/living room decor but bedding is too expensive. We have 8-10 decorative pillows on our sectional!
On the king upstairs, we have 4 pillows, 2 for sleeping with, 2 smaller pillows to slip between the knees. On the twin downstairs, just 2. The main pillow & a pillow sham.