The bulk update request #12987 is pending approval.
create alias pained_look (155) -> pain (12101)
create alias pained_expression (830) -> pain (12101)
create alias worried_look (3129) -> worried (13287)
create alias panicked_look (240) -> panicking (2528)
create alias nervous_look (155) -> nervous (30888)
create alias smug_face (10777) -> smug (26315)
Reason: Initially was going to simply suggest aliasing "_look" tags to "_expression," as the "look" on a character's face is the same as their expression.
However, I noticed that "worried_expression" has already been aliased to "worried." Same goes for "nervous." For consistency, I assume the same should be done for other expression/look tags.
Similarly, the "smug" wiki states that it refers to "When a character is so proud of themselves to the point of showing arrogance. Usually shown with an overconfident smirk." From a search of "smug -smug_face", there really aren't any posts that don't show characters with a smug expression, making "smug_face" seem quite redundant.