How do you balance your divorced parents' schedules for the holidays?

I'm out of college and on my own. My parents have been divorced for about 5 years (and both are remarried). My dad's side is really fun to hang out with, and my mom's side is always unpleasant. At the holidays my mom is always pressuring me to "choose" her events/dinners/gatherings. I don't care to spend a lot of time with her because it's unpleasant. My dad is always supportive no matter what. How do I balance this?