Whoa! Hey, look, I made a meme!
Never thought this would ever happen. Guess being bored enough can do miracles.
I actually had this idea already some time ago. I can't remember where exactly, but I think I was reading somewhere a comment about some random web comic or anime or something, that said that all the characters in said comic/anime/can'tremember, regardless of personality, always reacted in identical way to each other. The same stock smile, the same stock lines of dialogue when something happened. That does steal away from the characters. It doesn't matter if you tell your audience that this character is headstrong tomboy, if her expressions are copies of the character you claim to be shy, your audience isn't going to believe you. I didn't find comparative character expression charts, so I hope this can be useful.
At least I find it interesting to compare different characters' reactions.
Personality and attitude shows through in how people handle their emotions which in turn show on their faces, and thus even when people might have the same expressions (like smile, anger, fear) they will always include a little bit of themselves in those expressions. If you for example take my comic characters Surama and Hafmar from Wurr and look how they express themselves, you can see distinct differences. One of Surama's most dominant personality features is that she's absolutely 100 percent self-confident, so whatever happens she never completely loses her cool or freaks out, compared to Hafmar who's less confident and lets his emotions show a lot easier.
(Having canine characters also has the extra bonus of having expressive ears, I'm pretty careful in how I position them. For example Surama keeps her ears up almost all the time, where as submissive Hafmar keeps his down often when interacting with other characters. As a little hint, there are couple of moments in the comic where the ear position might bring some extra hint in how some characters feel. Nothing major, but still.)
It's not the prettiest meme, but I hope it can come useful for people in examining the personality differences of their characters. It's the first meme I've ever made. Run with it! (And let me see your takes! I'd love to see them.)