Dress? Shirt?

The first time I wore this piece, I wore it as a dress. It turns out I can use it for a shirt too. It would just be a very long shirt! I wore this on day 8, and now... its like day... 66. I am not the biggest plaid fan (anymore), but it felt appropriate to wear today for some reason. So, in your opinion, do you think this piece works best as a shirt or a dress?

My Outfit for Today: March 6, 2012.

Top: Forever 21 NYC
Cami: Hollister
Jeans: Forever 21
Shoes: Payless