I believe that it is more likely that president Obama was born in Kenya, not because it doesn't make sense that he was born in Hawaii, but because there is such a lack of documentation to prove that he was. The documents he has provided have often been questioned about authenticity. I think if he were born here, it would not be so difficult to prove beyond any doubt.
For a long time the "birthers" demanded a birth certificate. This has never been done for any other president. Then when a birth certificate was produced they started saying it was a fake, even though officials in Hawaii said it was authentic. Here is a quote from Loretta Fuddy. "I have seen the original records filed at the Department of Health and attest to the authenticity of the certified copies the department provided to the President that further prove the fact that he was born in Hawaii."