I have an old pocket knife, very small. That knife has gutted more game than any in my collection.
But my favorite is a Buck 110. The one I use I bought some 45 years ago. I tried using knives with gut hooks, but I don't like them, I guess I've never really figured out how to use them properly, cause they simply don't work for me.
Outside of making sure it's a locking blade, just pick one that fits your hand well, and has some form of a hand stop to keep your hand from sliding across the blade. I did that once, I ended up in the ER with some serious injuries to my fingers.
I also know a guy that USED to be an F117A pilot. I sold him a Spiderco, and one night while acting stupid, he slammed it into a wall, but he hit a stud and his hand and fingers slid across blade. That was the end of his career as a fighter pilot, and most of the function in his right hand.
GS