I am buying my first Littmann since I was using a Prestige in school and wanted to upgrade. On Medisave.net the site offers free engraving on the bell I am planning on putting my name and RN after it. I see that you can put symbols such as a smiley face, heart, cloud, cross, or even horoscopes. I have never seen these on a stethoscope before. Are these symbols considered unprofessional? I know it doesnt change how you work obviously but I am wondering how others see it. In clinical my instructor commented on my stethoscope being "loud" because it was purple so this made me think of it.