Branson offers a ton of special events for the holidays.  Sure the standard shows add a few Christmas Songs (Pierce Arrow, Presleys) but some of these attractions are entirely different than the regular. 

The "Trail of Lights" at Shephard of the Hills is a prime example.  2 1/2 miles of trail packed with light shows, scenes and music.  It will take you about 2 hours to complete (depending on the speed of the car in front of you and how often you are the hold up.  You drive your own car through with the lights off, (don't worry the road is marked with strings of lights).  Most of the scenes are antimated and follow a dozen themes (Victorian, North Pole Village, Patriotic, etc.)  Music is played throughout the route.  At $10 per adult, its a real blast.  You also get a free warm drink and a ride to the top of the tower to see where you've been. 

Silver Dollar City is another unique opportunity.  Their shows are tailored to the season with 7 holiday special offerings.  From a truly professional Dickens "A Cristmas Carol" to a moving retelling of the Nativity, the shows are first rate.  The park itself has over 4 million lights and is amazing. 

A Christmas Snow at the Starlight is a professional adaptation of an inspirational movie featuring the stars of the movie. 

A Christmas Miracle at Sight and Sound Theater is a two hour musical retelling of the biblical Christmas story that is worth a look.  One thing though,  many of the events are at night and even southern Missouri is cold this time of year.  Bring clothes to dress accordingly. 

Also, visit events that are opened mid-week when possible.  The week-end crowds can be intense.