The acting I've done has been in plays, not trying to be a character from a fandom, so it's a bit different; I am interpreting the character my way, not trying to copy the mannerisms and speech of another actor in a role. So yeah, I see what you mean. I could dress as Vila (but wouldn't, being the wrong shape), but I don't think I'd have a hope of acting him seeing I can't even get my eyebrows to move the way his do. I can do the voice intonation and that's about it.

The only fannish RPing I've done is on-line games with others on LJ; all I have to get right is the written dialogue. :-)