I've been meaning to do this for a while. Not really playing anywhere at the moment, but Arx is looking like my go-to Mu* when I get back into it. Mainly an RPI player, but always played Mushes too.
Old or defunct:
Shadowrun: Siena, Maria
Shadowrun: Detroit- Jocasta, Natty, Sukanya
Shadowrun: Denver- Sabra
Evolution of Esos: Tamsyn, Valeska
Armageddon: Juvanna, Pai Ming, Zuania (back to Mudding: Mayreni)
Arx: Drea Redrain