2 Nephi 33

2 Nephi 33:1 Neither am I mighty in writing, like unto speaking. This puts Nephi in a smaller group than those who feel the opposite.  We have prophets who were concerned that they were not competent to be the prophet based on their lack of speaking ability, but apparently, since Nephi's message was intended predominately for people who would not listen to him, he was given the trial of feeling inadequate in writing.

This may give some insight into what your talents are going to prepare you for, or rather, what you should expect to be called to do based on your weaknesses.  For me specifically, I enjoy teaching; I feel like I do it well.  I also enjoy giving talks in Sacrament meeting.  I don't enjoy interacting with people I don't know.  I don't like going to meetings.  I lack patience in a number of situations: when people try to explain something I already know, when driving, at night.  I fail to assume best intent with most people.

Ergo, I will be called to interact with people I don't know, who do not believe I know what is going on, possibly while driving, late at night.  Oh, and these people will be suspected of doing something bad.  But I won't teach or preach as the main focus of my service.

Maybe.