ANB
They weren't the most compelling villains here, but I was always amused by the noises they made, if a little confused by why they were Dark Cynder's army. For most of the game, I felt pretty sorry for them since they were continuously being beaten up in the most horrible ways (LoS is one of the more violent set of games I've ever played, oddly, which is one of many reasons the series just doesn't sit well with me).
TEN
This is where they really started to stand out to me. In several scenes, Gaul implies that the apes have endured a lot of suffering at the dragons' hands and I always wondered why. Gaul himself was a compelling character if you looked past the obvious stuff (I honestly don't buy that he was evil "just because", no matter how much the producers want you to believe that). Despite Gaul being the main boss, you really only had to fight the apes at the beginning and the end of the game, so I didn't grow to hate them for pushing me off things the way I hated the pirates, monster dogs, ghouls, and pretty much every other enemy. If you stop to think about it, there was also a really interesting father-daughter relationship hinted at in TEN between him and Cynder.
DotD
And here is where what little tolerance I had for the dragons' side of the war went away. They already had some arrogance issues previously, but it was pushed over the edge here and I was pretty much rooting for the whole world to be destroyed if for nothing other than a reason to start things over in that universe. I thought it was monstrously unfair what Malefor did to the apes and what was implied about them (again, this was where the producers really tried to push the "oh, well, they're evil because they're evil" schtick, which is just sad because there was a lot more potential they skipped). What happened to Malefor by the end wasn't nearly what he deserved. As for being game enemies, they were my favorites to fight in DotD. Like ANB, they made fun noises, looked cool, and were pretty fun to fight (grab one and sling him around to re-kill all his zombie monkey pals!

For fun, here's the cover for my never-finished backstory about the apes and Gaul, Hand of Darkness. Even when I liked LoS, the villains were more interesting than the cookie-cutter trope-fillers that are every single good guy with a speaking part. The apes also showed up pretty frequently in my old Cynder 100.
Feel free to post any ape art/stories you've made or seen/read and enjoyed here as well any commentary you've got.