To have a cohesive acting group you've got to have people of many different types. You can't just have a group of "stars" of one type -- there have to be all sorts of different roles and actors that go well together and actors that contrast each other. In this regard movie actors as a group are more characteristic of the general public than theater actors, which seems to definitely attract some types more than others (this has to do with dramatic expression, which is no longer much a part of movie acting, since movies are much more like real life).

If you gather together a group of people of one type -- even a small one (3 or 4 people) -- the demand for other types of information metabolism becomes unbearable. If someone were to come along of any other type, he or she would instantly be sought out to counterbalance all the people of the same type. This is one of the forces that evens out type distribution in all fields of activity.

Actors actually don't have that large a range of what they are able to portray convincingly. Though it may seem like they change their identity all the time, in actuality they're just walking around in circles, playing the same few kinds of characters. Famous actors choose the roles they play and hence pick ones that they feel they can grow into easily and find rewarding. Their choices are strongly related to type and to other dominant inborn traits. Take any actor, for example:
- Arnold Schwarzeneggar
- Angelina Jolie
- Tom Cruise
- Eddie Murphy
- etc.

Some have a slightly wider range than others, but not by much.