I don't think anyone will be able to give you an absolute answer. It all depends upon the distance you plan on taking the majority of your shots at, the size and type (steel vs. lead) of shot you are using, the type of game, and other variables.

As a general rule, the more open chokes are used for closer shots and/or shots at faster moving game. The more closed shots are used at further and/or slower moving game.

Also, all chokes are not created equal. While a modified choke should pattern tighter than an improved cylinder choke, you may find that one brand of modified choke actually shoots a more open pattern than another brand of modified choke. Plus different loads will react differently in different chokes.

I've used Xtra full or full chokes for turkey and skeet chokes for grouse hunting, but I generaly find 90% of all my shooting can be handled by an improved cylinder or modified choke.