You are a highly specialized form of Criminal- and you are proud of it.  Among the Thieves' and Fencing Guilds, you are known as a Burglar- someone who knows how to use stealth and tools to take valuables.  You consider these skills as "fine art" and measure the success of a job by a clean and efficient execution without discovery.  Many Burglars may specialize in the purloining of certain items- jewels, money, relics, etc.  While others focus on the execution of the job flawlessly.

Burglary is an art, and every great Burglar has a "signature" or a "calling card" to boast of their exploits.  To those in the know, reputation and respect is given to a Burglar on a successful job who leaves their calling card.  A calling card can be anything- a trinket, a piece of origami, a coin, a poem.  Burglars also delight in the angst this causes any City Watch, personal guard or private investigator who must try to glean who the true character is behind a calling card. 

The more a skilled Burglar eludes authorities and plies their trade, the more their reputation grows.  A Burglar can become a small celebrity- or even a legend- among their kind and may find easy protection, eager business and willing contacts with those of their ilk.