I'd rather have a rusty nail driven through my nether regions than describe an ogre as looking like Shrek.
Funny enough, they resemble the ogres from either the very first Final Fantasy game (purple skinned brutes with flat-topped heads) or the ogres from the
Dungeons & Dragons: Tower of Doom arcade game.
That might be "heretical" to some, but dude...I played this game a
lot. Got to the point where I could beat it in one quarter going through the red dragon.
Anyways! The game also influenced how I like to picture kobolds as well, and their design in the game was clearly referenced from the illustration of the kobold from the 2E Monster Compendium.
Orcs? I see them as LOTR-ish as well. Nastier the better.
Now that I think on it...I think a lot of look for...stuff was influenced by this n' that video game. Back in the DAYYYYS OF YORE, illustrations of monsters, good, inspired, or at all were hard to come by. Especially with 2E adventures mentioning monsters from other Monstrous Compendiums you didn't have. I remember getting
The Shining South and one of the adventures mentions a glabrezu and two vrocks in the dungeron. At that time, all outsiders were relegated to the
Outer Planes Appendix ghetto. I RACKED my brains trying to figure out what in the hell they were supposed to look like! I think there was an illustration of a glabrezu with the adventure, but wasn't quite clear to my 13 year old brain what-in-the-hell exactly it was supposed to be or if it wasn't just some random illustration they threw in there (because I had noticed a LOT of art reprints in 2E products even then).
I ended up drawing what I thought a glabrezu looked like. It looked like a grell. :|