In my campaign, I play as 2 characters, its not ideal, but it is fun. I really like having /me at the beginning of my macros and abilities to separate the roll and make it clear to the rest of the group who rolled. This is especially needed when I play more than one character. I know that I can change the name at the bottom of the chat, but I don't want to constantly keep track of that. Much better would be an /as emote where the user could type in something like "/as Jim Darkmagic" and have it display as if the user had changed the name at the bottom of the chat and done a /me.