Outdated Wallpaper
While bold and patterned wallpaper comes in and out of style every few years, that also means that there will be many time periods when they will look outdated. You can compromise by having one statement wall with a bold wallpaper print, but there’s really no reason to wallpaper all four walls of the room.
Baby Pink And Blue
Baby pink and baby blue are certainly acceptable in nurseries, but these colors should stay away from other rooms in the house, unless you want it to look like cotton candy. These should also not be in the same room, otherwise you’ll risk looking like you live in a My Little Pony themed house.