I used to wear pretty much everything untucked. I used to hate tucked look, feeling it too formal and almost to the extend of being dumb-looking. :) The problem with untucked look is that your pants better fit perfectly because wearing a belt underneath an un-tucked shirt is, um, not going to work that well either. So when I created this look in the morning, I went through the process of having the shirt un-tucked first, then, tucked in, then pulled out. In the end, half was in and half was out. Now I found that I achieved a balance. Hehehe!
Short-sleeve shirt: Banana Republic
Jean Jacket: Loft
Cargo pants: Hollister
Nude Sandals: Nine West