Elenthari, I love your second banner!
So... having got caught up, I shall say:
Lady Dark Moon - Intricate charries who are generally male, start off dark or on the off side of neutral. Invariably, there are rational reasons in the charrie's past for the present personality/situation.
Valera Elenhathel - No comment. Actually a comment

Yeah, I generally play females, big surprise. Set it up and hang on for the ride.
@LDM - *quotes* "Brings to mind those sophisticated, kick@$$ movie women with gorgeous looks and an AK-47 behind their backs. Hah... okay not really...." lol. except that they are usually plain looking and I prefer M-16s...
pirateoftherings - Excellent canon charries, OCs are highly detailed, calculating personalities who do what needs to be done without getting excessively emotionally involved.
Meldawen - Usually the "heart" of the RP. Her charries are the female healers, the compassionate, sometimes naive personalities. She's one of the few who can take one or two MS qualities and really make them work.
Turwaithiel Swann - I haven't RPed with you much, but I generally associate you with elven women
Eruraina Aniarure - Generally young, sword-wielding young women with a thing for animals, especially horses.
Aerlinniel ó Eressëa - I've only been in one RP with you, so I really can't say. Sorry.
Aerandir - Warrior/leader types in their thirties, with the noble/honor/duty thing going on. I don't know why, but I envision most of your charries with beards

I think your roles tend to be quieter, but forceful, with a lot of introspection, which usually leads to novel-lengths
Elenya - Male supporting roles, quiet and amiable, but with a wry or hidden sense of humor. Your outcast/oddball charries, such as Ruthnak in the FR RP, are very human and one can empathize with their sits.
Elegost Eruaphadion - All of Ellie's charries have British accents

I think they tend to mostly be Magellan-esque - the civilized adventurer/leader type. Not quite gregarious, but close, and usually middle-aged, giving an impression of experience.
Curunìr - Dark, twisted, scheming charries, always looking out for number one, and making no bones about it. Curunir's opposite charrie would be a simple farmboy hero/Luke Skywalker type
In terms of an RP I would favor a fantasy setting, since that's what most of our charries are drawn from. Well, there are the proud few of us who appreciate sci-fi.
I think that, in describing our stereotypical charries, we may have managed to describe some attributes of each others personalities, as well.
I think my anti-stereotypical charrie would be: male, academic scholar/supporter of established order, probably occupying some high position, a pacifist/knowing nothing about weapons ... mmm, I don't know if he would be a philanderer or a sworn celibate

Or am I completely wrong?