Most bathroom lights are recessed lights and for good reason. Most bathrooms do not have too high a ceiling and you really do not need wall lamps jutting into the already confining 
space in your bath.
Most bathrooms follow a default lighting system. There would be the single light above or on either side of the mirror and there would be the one for the shower. If instead of a flush mounted mirror you have a medicine cabinet with mirrors you can install small wall lamps and get away with it but otherwise a single bar light on either side is the norm.
Most showers would have recessed shower lighting because you really do not want water splashing on the light. Added to this is the fact that even if the bathroom as a whole would be the dampest place in the home, the shower specifically gets the treatment here. This is because even if water cannot get into a lighting system, there is always the steam from the bath that can coat the inside of the lamp shade. Over time this may either promote growth of mildew in really humid places or will start to collect dirt.
You will therefore have to install something that does not allow any moisture into the unit and the simplest, yet most effective such system is the recessed shower light. Because it is recessed into the ceiling there is no infringement into the bath space while you get lights with different output so that you can choose the brightness levels that you need.
If you feel that changing the light would be a hassle, all you need to do is to install a good quality fluorescent light. These bulbs last an average of 20,000 hrs which means that you will probably never have to replace them, ever.
Just make sure that you get the right unit for the right bulb. This is because the fluorescent bulbs tend to generate a lot of heat which needs to be dispersed properly. Units meant to be used with these bulbs come with ventilation holes on their upper side so that this heat is released. Using these bulbs in ones that do not have such a system is really not advised as if you leave the light on long enough, it can actually get hot enough to become dangerous.