No one is forcing you to tell your children the myth of Santa...I have plenty of friends who have decided to tell their kids that there isn't really a santa, and that mommy and daddy work really hard so they can have presents at Christmas.
Sadly, it sounds like you have never got to experience the magic of Christmas. Unfortunately, your kids will probably be the same way because of how unenthusiastic you are. Really, really unfortunate.
Read "The Polar Express" or the real story of St. Nicholas and maybe that will help you get over yourself and help you see Christmas through the eyes of a child. By the way, I don't know any kids whose parents had to tell them that Santa wasn't real. . .most kids find out on their own and by the time they do, it isn't that big of a shock. My parents continued to play santa until my sister's and I moved out of the house.
My dad was super enthusiastic about Christmas. He loved being santa every year. Thanks to that, Christmas is the most magical and special time of the year even though I am obviously old enough to know that Santa is just a myth . . . not to mention that I'm not even Christian anymore, lol. I'm Muslim.