You don’t have to buy decorative shelf brackets - you can make them instead. With a little imagination and some common sense, you could take many household or flea market objects and turn them into creative and unique shelf brackets. Bicycle handlebars, old baseball bats, hockey sticks and children’s toys could all be usable as brackets. Just remember that first and foremost they need to provide stable and uniform support for the shelves that they are meant to hold up.
If you are planning shelves for storage in your new bathroom, consider building shelves that are recessed into the wall. These shelves can be either framed with trim or left unframed. Or you can add doors to keep things on the shelves dust free. In a small bathroom, doors with glass or frosted glass doors will make the room appear more spacious than solid wood doors (and frosting creates enough blurring that you don’t need to be quite as neat). You can use the shelves strictly for storage or you can mix storage and display of decorative items. If you cannot or do not want to build recessed shelves, you might consider installing glass shelves. Because they are clear and reflect light, they do not make the room look smaller, as wood shelves might do.