Hmmm...
Deus-Ex can be whatever you want it to be. You want to snick like a thief and hack computers - you can. You want to shoot everything that moves - you can do that also. There are multiple solutions to each problem and the story changes according to the choices that you make. That is the all beauty of rpg`s. If you dont like them, dont play them ( and no, diablo is not an rpg, it`s an action game disguised as one )