Currently 3. I swap optics way too much, and I don't hunt different areas very often. 99.9% of my hunting is in my woods behind my house. It's probably been 15 years since I hunted anywhere else.
8x56 SLC for hunting, 12x50 UVHD+ that I keep in the house, and 10x42 Trinovid I keep in my garage.
2... I mean too many. 4 - Swarovski EL 10x42, Noctivit 8x42, a Trinovid 8x32 and an Ultravid 8x20 I carry in my pocket. One pair of eyes, 4 pairs of binoculars, I can't defend my decisions.