I prefer structured bags, but will flirt with the odd slouchy individual every now and then. My only big NO is an ill-fitted, saggy lining in a slouchy bag - it's a combo I just can't deal with. Takes a special kinda lining to make slouch work for me. For example, my Lumi Supermarket XXL bag is the perfect combo of slouchy, soft leather and a thick cotton lining that fits like a glove. Love it.