Strangely enough, Creationism, or Creationists either, have not turned me off to Christianity. (This is news? :rolleyes: )
On the other hand, the insistence that “this is a mandatory piece of the pie, to be believed despite evidence pointing to the contrary” is the hallmark of people with self-imposed blinders – and a demand that one not use the brain one has devoted to God’s service. Ergo, I get very frustrated with that POV. As evidenced by my recent “Wild Bill hiccup” over in the Pit. 
To be frank, I am a Creationist in the dictionary use of the term (y’listenin’, Gaspode?). I believe in the existence of a God Who created everything.
However, I’m firmly convinced that the Universe He created gives firm evidence of the techniques He used in doing that Creation, e.g., the Big Bang, inflationary early-cosmology, phylogenetic evolution, etc.
For the record, which I’m beginning to sound like a broken one of on this topic, Genesis 1 is a myth. A reading of Joseph Campbell or any of Freyr’s posts or my own on the topic would make it clear we’re not speaking of truth value but literary genre. It’s a simplistic account of God’s work useful for drumming home the essential facts the author of that chapter felt to be important: God created. By His Word. In sequence. And called it good. The whole thing is wrapped in a repetitive stylistic device reminiscent of the Three Bears – just as you know that whatever Goldilocks finds is gonna come in threes, with the parent bears’ possessions too much one way or the other, but the baby bear’s thing being just right – and if you’ve ever read that to a preschooler, you know how much fun they have reciting that bit along with you – so you know that when the author gets to the Tyrannosaurus, he’s gonna say, “And on the Nth day, God said, ‘Let there be tyrannosaurs,’ And there were tyrannosaurs. And God saw the tyrannosaurs, that they were good, and the evening and the morning were the Nth day.” The six-days bit was an attempt by the (Jewish) author to stress the importance of the Sabbath, by making it an essential element of Creation. If Chaim or Zev or Izzy wanders in, they can speak to that issue, because it’s of vital importance to Judaism then and now. The point to having the story take six days was not to describe how long God took in doing creation – He could have wrapped the whole thing up in a nanosecond if He chose – but to make clear that the Sabbath was an integral part of what He created.
Sidebar for a joke:
“You know, God didn’t create the world in six days.”
“No? What did He do, then?”
“Well, he goofed off for five and a half, and then pulled an all-nighter.”
And, JFTR, most major denominations of Christianity do not expect adherence to the six-day literalist interpretation – even the SBC and Assemblies of God don’t require it, although many of their leaders believe it, and the Episcopalians, Methodists, Lutherans, and a number of others find the advocacy of the theory by outspoken conservative Christians to be an embarrassment to their attempt to focus on commitment to God as known through Jesus, and fulfillment of His expectations to the creation He entrusted us with and to one’s fellow man. And that, IMHO, is the point to be stressed by anyone who calls himself or herself Christian, not an attempt to sell some particular interpretation of a Bible passage.