I rarely kill a buck. Every buck I've ever killed tasted too gamey for me. A young(ish) doe tastes much better. I used to be quick to take a doe fawn because they taste that much better, but even though they're easy to drag, it makes for a lot of work for a little meat, and there's the risk of shooting a button. A 1 1/2 YO doe is perfect. I leave the bucks for the guys around me that live to hunt horns.
The big ol' mammy does have more experience raising fawns and are shown in studies to have a better success rate at getting them grown, so I usually let them walk and I encourage my neighbors to do the same. Horse-faced does are prized around here.