No matter how thrilled you may be with it at the beginning, you are going to get tired of it, outgrow it, or feel it is too dated someday. If you have to move, you will be advised to take it down by your Realtor to make your house more marketable, as tastes vary. Hanging wallpaper is not easy. Perhaps that is why so many different paint techniques were invented. It solves that problem.
Some homes look much better with wallpaper.
Traditional homes can look wonderful with wallpaper and beautiful moldings. If you pick a subtle, traditional design, you may find a pattern you can live with for years. Or you may want something that will excite you. If it is the bathroom, what you see is what you get. If it is a room where the wallpaper will be seen from a distance, stand back and look at it before you buy it.