I remember seeing a mod some time ago that tweaked the facial expressions for characters in Oblivion so that they aren't so freakin' exaggerated.
I can't seem to find it now. I don't know why I didn't download it back then.
I was just creating a new character who looks just fine with a neutral expression, but when she looks at a character that she has a positive disposition with, her face is literally:
:]

Does anyone know the name of this mod?

Well I dunno, it depends on how you look at it. I mean 100 should be some kind of love struck, devoted, loyal for life type state considering it's the maximum disposition you can get with someone. Inthat case maybe the exaggerated expressions make sense, and it could be changed on a gameplay perspective. (ie: make disposition much harder to gain, and increase NPC interactions so that you can actually develop a sense of character, attachment, and individuality with the NPCs.)
.... A man can dream, can't he?

Anyway. Description contains: "expression" I found these results (43 in all)
http://www.tesnexus.com/downloads/file.php?id=28379
Well actually thats about the only one I saw that edited how they show up normally

Hmm. This seems a bit more interactive than the one I remember.
I think the other one was just a simple mesh replacer or something.
All it did was kind of even out the smiles and stuff so they go from:

C: to (: etc
Oh well -- I guess it's not terribly important. Could have just been removed from Nexus!
Thanks anyway~

Actors in Emotions
http://www.tesnexus.com/downloads/file.php?id=15124