Honestly, there are so many good knives out there. I've used Primos, Buck Knife, Old Timer and Marble.
This year I'm trying a Schrade. They have quite the selection, but I've snagged a couple to see which one I like best.
I never use a gut hook and I cut through the sternum, so I need a pretty strong knife. Several have held up wonderfully in the past, but I've started to lean away from folding knives and use fixed blades more.
Though I've heard good things about those outdoorsman utility knives. Dunno how well they work, but I bet they're a wonder on small game.