I would agree that modified is likely the most useful choke. Years ago almost all shot guns came with full chokes. Since the adoption of shot cup style wads patterns have tightened up so modified is now a great choice. I might also opt for an improved cylinder choke as well.
An over/under I got several years ago came with Imp cyl, modified, imp mod, full , full and extra full. So far the only ones used have been imp cyl ( very rarely) and modified with bottom improved modified top .
It works well for hungarian partridge and sharptails as well as the occassional duck or goose. I also shoot trap and find the modified works well there.