for the record, that last comment was a joke. i play in and dm games where orcs are naturally evil but not without the capacity to change (or be a freak). they are nearly all evil though.To be serious though, I prefer having both options for orcs available to me as a GM (and to game designers). I think there is a lot of fun with the classic, Orcs are evil monsters, approach, that can work. But it can be just as much fun to have more varied orcs (and to treat all humanoids as having a wide range of cultures). I want access to both. I think it gets dull if people are doing it all one way or the other, because sometimes I want something that feels like Three Hearts, Three Lions, and sometimes I want Orcs that are more like humans. It can also be fun to have Orcs who are generally menacing because of cultural tendencies or because they are simply in conflict with humans in the area, but have just as much free will as humans. I have to say though, I only rarely encounter the whole orcs are evil so it is okay to kill them and take their stuff in games. So many settings and modules get mileage out of making them more interesting in order to open up things like diplomacy in the dungeon. Some of the best adventures I played in allowed for this, and that wouldn't have really been possible using the cosmically evil orc approach.
For me the issue is when one style starts to dominate, it gets dull quickly. I like variety in this respect.
both versions of usage obviously should be considered viable.
but yeah...my orcs are, in a general sense, very much so, evil.