I want to wear the unbuttoned cardigan w/ jeans. (I do not like the cardigan when buttoned up. Too stuffy) So, what shirt do I wear underneath? If I try an untucked oxford collared shirt, then it hangs much lower than the cardigan, and looks ridiculous from the back. (Cardigan goes to waist, untucked shirt hangs past your ass) Same logic applies for a T-Shirt. But, I don't want to tuck in a T-shirt. (douchey) Do I tuck in the oxford as the best bet? Anyone got any model pics I can use as guidance? Thanks!