I have Leupold scopes on every rifle I own except one, which is a Pre-64 Winchester Model 70 .300 H&H that wears a vintage Weaver KV variable because it's a great period piece.
I use Leupolds because they're a proven company that offers a lot of bang for the buck, plus their warranty is second to none. I like their 2.5-8x36mm, 3-9x40mm, and 3.5-10x40mm variables with regular duplex reticles, although I do have a 4-12x40mm with the LR duplex reticle mounted on a .22-250. Also have a couple Leupold's on big-game rifles that have M1 elevation turrets. For a calling rifle, I like something with low magnification and a wide field of view on the low end.
I also use Leica 10x42 Geovids, Vortex Kaibab 15x56mm binos, and a Minox MD62 spotting scope.