I prefer the fit of the dry packaged t-shirts actually. I thought I liked the slimness of the premium cotton ones at first but I'm really not a fan of tight t-shirts as it turns out, especially in the arms. Cotton is really soft, though so I might try sizing up when they restock them and seeing how that works, since it almost seems to simply fit small all around - shoulders, chest, sleeves. The fabric on the dry fit is average/bad but it doesn't really affect appearance much. Fortunately I have a few of the normal cotton t-shirts which fit similarly (better even) but are 100% cotton, not poly/cotton blend. I just wish they would keep the shoulder and sleeve width of the dry-fit, but slim down the chest/waist a little bit. But they're not making t-shirts for me.
i'm buying a bunch of the dry packaged tees for bumming around, but i wish they were about -1" in width and +1" in length.