Actors tend to get a feel of their character before they perform. Lots
of actors method act to get the pert down right for a performance ( like
my character Brandon in check please ). For example, Christian Bale who
plays batman in THE DARK KNIGHT, had himself get a serious personality
for his character by staying away from people. By the way, the dark
knight rises is coming out this summer with Catwoman as Anne Hathaway.
Many other actors use method acting too. Staying in character is also
another important thing to do when acting. Many actors on movies and
plays have no problem with that, they actually stay in character even
after the performance is done. For instance, Taylor Lautner from
twilight is a good actor as long as he has his werewolf powers. When
came to abduction, another movie he played in, he was Jacob in disguise
except he didn't have his werewolf powers. Another good example, would
be Selena Gomez, she is an actor that plays in wizards of waverly place
on disney channel. Her character has all those funny remark and doesn't
get along with siblings. She played two other movies with the same
personality, Princess protection program and Romona and Beezes. She was
in character, just too long, and its not her real personality, if you
look at her interviews, she even says it herself. Actors just get to
absorbed into their character that they want to keep it as their
personality. Angelina Jolie is another example of a person who holds on
to her character. Angelina is known for tomb raider, she usually only
does movies that she is the main character. She was a fearless warrior
in tomb raider, and when she did the movie salt, she was that same
fearless girl that is not afraid to fight. She held onto the fearless
tomb raider into the movie salt and it seemed almost exact. Sometimes
actors love their old character that they hold on to it.