But SIMS by the 24th century(the way video game technology alone is progressing)would be just like the EMH.I personally felt they started out doing to to endulge Kes.
While Kes had some wisdom, her innocence made her see the EMH as "real" much like how a kid believes his/her toys are "real" and "alive".
If the holdecks are the equivalent to complete and totally interactive video games, then isn't the doctor no different than an interactive SIMS man?
You certainly have a point. But IMO the difference between an "interactive SIMS man" and the doctor is, that the doctor is aware of his own nature and therefore can reflect about. An "interactive SIMS man" that isn't aware of being what he is can't reflect about his nature and - because of that - can't overcome his original programming. The doctor can - and he did, as the series showed.
Think about it, why have and interactive SIMS type man if he couldn't behave like a regular human being. Interactive games are meant to bring you into that world as if it were real, right?
Well, than SIMS man with these characteristics should be considered as lifeforms.
But, as it was shown in the trek-universe, there is a difference between the doctor and a regular holodeck-character. Both are interactive, but a regular holodeck-character is not aware of his own nature and thus can't overcome his initial programming. Because of this, he isn't alive - he can't leave "the game", the EMH can.