The best stock design should be determined by how the rifle will be used. The stock that is perfect on big bore bolt gun is out of place on a mountain rifle. The stock that gives life to your quick handling deer rifle probably won't give the stability you'll crave on your varmint rifle. Any rifle that is going to be used for practical shooting in the field should have nice sharp checkering. The trouble is that checkering tends to have a short life expectancy. Even the checkering on my McMillan Express stock wore smooth after a few years of heavy use.
Aesthetically I prefer the older style classic stock, the new ones have too high a comb for my tastes. Should you have a powerful rifle stocked in a modern classic, and you opt to shoot it with irons, you may well find that you're forced to mash your cheek down very hard in order to obtain a sight picture, and at the shot the recoil will rattle your teeth. But should you find it necessary to mount the scope high due to its large objective, a stock with a high comb is beneficial. As much as I dislike Weatherby's trademark California style monte-carlos when I throw a Weatherby rifle to my shoulder, chances are I don't have to squirm around looking for the reticle, it'll be right there. My son's Ruger Hawkeye is more pleasing to my eye though, and the moment the rifle hits the shoulder, its reticle is right there as well. I appreciate a narrow rounded forend on a hunting rifle. Despite the advantage a wide flat bottom design has when shooting off a front bag, too me it looks out of place on a hunting rifle.
Sometimes a stock works well in some positions but not others, my ZG-47 is such an example, in that it provides a suitable handle in all field positions, but when I go into prone it feels like there isn't enough support for my cheek, probably because I shortened the LOP and in prone my cheek is farther forward on the comb.
The worst stock in the house is the classic Bell and Carlson on my M-7 .243. The stock has a short forend, but it feels clubby through the butt and pistol grip, and its tricky to fire without pulling the shot to the right. Conversely my fully adjustable McMillan A-5 is perhaps the best feeling stock I own, but this monstrosity has no place on a hunting rifle.