I recently designed a walk in wardrobe for a client, and the client asked whether to install doors for the cabinet. Some people may have preference but most importantly you must think of your own habit to answer this question.
A walk in wardrobe without doors will be just like walking into a boutique, and you can mix and match your clothing without opening and closing any doors. The downside is, again like a boutique too, if you don’t hang your clothing back or fold the shirt into a neat pile, your walk in wardrobe will soon look like the “On Sale” table in Kmart.
Vice versa, having a door will keep your walk in wardrobe tidy always, but you really do need to keep your wardrobe tidy inside. Otherwise, you will have difficulties finding the clothing you want behind the doors. I proposed to my client to have doors for most of the cabinet and kept two open cabinet for clothing that are regularly worn.