The bulk update request #12987 is pending approval.
create alias pained_look (160) -> pain (12725)
create alias pained_expression (1078) -> pain (12725)
create alias worried_look (3345) -> worried (13807)
create alias panicked_look (284) -> panicking (2676)
create alias nervous_look (214) -> nervous (32742)
create alias smug_face (11545) -> smug (27782)
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.