Do whatever comes naturally to you. I've seen DMs who aren't that good at description reaching for a colorful description at the table because they think they should, and it comes off as forced. Minimal description is better than a forced one.
Also, get the players to describe their attacks. You only need to describe what effect it has on the baddie.
Another idea: get some small stickers and label them head, body, left arm etc, and then stick them on a die. You have your own hit location die now. You can do it with whatever sided die strikes your fancy. d6 is simplest, but with more sides you can add "chest, back, groin etc" (BTW, I believe you can buy these kinds of dice too) The players will have to understand that this is just for fun/flavor and has no bearing on the mechanics ("no he doesn't get a minus just because you hit him in the head").
More fun can be had when everyone uses one. Just roll it alongside the d20 when attacking. Even when you miss, at least you know what body part you grazed with your axe. When someone lands a killing blow you can describe various limbs lopped off, etc.
I do this for my C&C group and its fun.