not to mention I am bad at taking a compliment

Last month I got to meet the charming Jennifer of under the ponderosas, who was in town for a conference. In the course of our conversation, she complimented my photography and I immediately tried to deflect.

Why is it so hard to take a compliment, to just say thanks and move on? Even if I don't think I deserve a complement, shouldn't I be gracious enough to just say thank you?