This is all a matter of personal taste. You can get whatever you want, and whatever your artist is willing to do. You can choose a picture off the wall, or you can have them create a custom piece just for you. Your only limit is your own imagination. As far as where you should get it goes, just keep in mind what you do for work and the type of social circles you are in. You might want to consider placing your tattoo where it can be easily covered up with normal clothing.