Um, the fighter bit wasn't a profession (unless you were a mercenary, in which case you got lots of cash, but everybody pretended they hated you and ordered you to be driven away at the first opportunity to do so). It was a caste thing. You were born a knight and it became your responsibility to do knightly things by right of birth. Same thing with monarch, although the nobles in the caste system usually were able to do other things aside from cut people's heads off by order of the liege lord.
Just, thought I'd point that out.
Anyway, scribe, all the way. I'm a total book nerd and I love writing. Of course, this kind of assumes I was born in the noble caste and thus allowed to have an education, so I guess the above statement doesn't really apply much anyway.
Medieval times sucked.