I have no passion for administrative work not in my job description
A few years ago, I was hired to be a programmer at a small Financial firm. About a year and half ago, they fired the secretary and I ended up with her responsibilities in addition to my role as a programmer (so I'm doing the job of 2 people.)
While I see it as my duty to try to complete the secretary work, I don't put much effort towards improving my "secretary" skills. The way I see it, I have a career as Programmer and I will continue to work at learning new skills in that area but not in the area of being an admin assistant.
My boss was not too happy about my performance in the last annual review and almost all of his complaints centered around how I'm not taking the secretary work seriously. Keep in mind I'm the lead programmer for the firm and I'd rather make myself a top performing programmer than a mediocre programmer + mediocre secretary. I remind my boss that I was originally hired to be a programmer and I had no secretary experience on my resume, and I prioritize learning and improving my skills in that area over administrative skills, and if he doesn't like it, he needs to hire a new secretary rather than have his best programmer take on these additional burdens. He did not seem pleased with my response but he added that the company is facing financial difficulties and cannot afford a secretary.