UwU literally represents "cute anime face"
But I've watched anime and played video games with anime style characters, and nearly every anime character has the same face. They only differentiate characters by hair style and color.
Also, more serious or evil characters are usually animated with narrow eyes. The wider the eyes, the friendlier the character, with the exception of insane characters, who are usually also animated with wide eyes.
The characters are usually cast the same way. The reluctant hero with some hidden power who at some point has to come to grips with the responsibility that comes with it. The unbelievably personable and naive love interest who just can't seem to get the hero to notice her. The "hot, tough chick" who's all attitude because she has a tragic past and uses her "get them before they get me" front as a defense mechanism in order to not be hurt again. The big, dumb guy. The annoying, hyper nerdy kid who knows stuff so everyone puts up with her/him/shim. And the megalomaniacal evil character, who you know is the "bad guy" as soon as they come into frame.
I have seen/played some good anime/anime style games though too. Ghost in the Shell, Appleseed, Star Ocean, Cowboy Bebop. They go against the grain and are anything but typical.
I'm not a weeb. I just know a lot about Japanese culture and history ahem