I'm a proud member of the 12-Club - nearing my anniversary in February. I also own half a dozen additional Threadless designs. However, I'm slightly pissed off because my drawers of awesome T-Shirts are all too short after having been washed and dried. I generally get one washing out my shirts before they shrink up to an uncomfortable, yet wearable level. Each one is right at the limit to begin a belt reveal on my pants and that is just too short!
So Threadless, please pick up mens' shirts (large and above, presumably) with an additional inch or two in length. For your reference, I'm 1.99m tall and 81kg and large isn't cutting it.
I've found that they stay a decently same length if I hang them up to dry. But I most def wouldn't complain about longer t's. The longer the better.