We don't do the whole Santa Clause/Easter Bunny thing, either. There isn't a real reason why we chose not to. I just decided when she was a baby that I wanted credit for her presents and didn't want her to grow up thinking some stranger with a limitless wallet brought her presents. This past year, in 1st grade, she developed such an interest in Santa that we followed his path on GoogleMaps. She knew it wasn't real, but it was a lot of fun for her and a free geography lesson to boot! The Easter Bunny hasn't been an issue since she is absolutely terrified of big bunnies. She can handle little baby bunnies, but adults dressed in bunny costumes have always scared the living daylights out of her. She runs away screaming for her life.
I work with preschool kids and the subject makes me a bit uncomfortable sometimes. I usually avoid mentioning Santa or the Easter Bunny unless a kid brings it up first. Then, I'm fine with asking them what they asked Santa for. However, I never want to be the one to bring up those characters because I respect other parents who have chosen not to use them in their holiday celebrations. I live in an area that has a lot of very conservative Christians. There are a few different religions that I can't quite recall the names of. They're about 2 steps above Amish, very simple, plain, modest/old-fashioned style clothes, and holidays are strictly religious, not commercialized.