I am about 19 year old and go to college. Often I have to refer to myself in an introduction. What shall I call myself? 'Man' seems too old, 'boy' seems too young and 'guy' seems too informal. What shall I call myself?
Update: as a comment suggested, and I felt too, an example is needed. This is actually quite general. I want to use it, for example, in a blog, during conversations, or maybe in an interview. I am just looking for the most appealing noun.