I grew up around the kind of people who often bragged about their humility, which bothered me greatly, and I promised myself not to be like that as an adult.

The result is that I often use second-person pronouns to take credit for work I did alone. Once I got called out on it during a job interview, and I had to clarify that no, in fact, I alone was responsible for implementing this great feature I just got through telling you about. The 'we' was a figure of speech I used because I don't want to sound like a pompous ass who takes credit for all the work, even if I deserve credit for all the work, because I did all the work.

Simply using the right pronouns can be a subtle yet effective signal for the purposes of self-promotion.