Am I the only one to say "it depends"?
T-shirts and casual wear are typically in the dresser, office and dressy in the closet. I typically file-fold my jeans, which means I fold them in such a way there is a fold upward in the drawer so I can see them all instead of stacking them (I hate stacks in drawers for some reason).
But there's a caveat: any jeans that I wear for work and coloured jeans are hung in the closet with my trousers and other work attire. Most of my sweaters are folded in the top of the closet, above the hangers, with the exception of the finer gauge slouchy, which are orgamied over the hanger to avoid shoulder pulls, so they don't get forgotten as I leaf through blouses.
I guess I'm kinda an outta-sight-outta-mind gal.