I recently had an interesting discussion about the essence of classes, and what they are in real life. An idea awakened that a class is a skill set rather than a profession. Based on this I reasoned that characters in the game actually have more classes than what shows, the others just aren't relevant to adventuring, and so, they are not displayed.
The difference between a skill set and a profession is that a profession only tells what you are currently doing, whereas a skill set is the sum of all your former professions, hobbies and education. These can, in theory, give you several classes, that D&D employs as a single class that's based on your skill set.
Now, this isn't about your FR or D&D class, hence the location. You may however, if you want to, tell the readers how your skill set would qualify you to a class. The main point is to display what your skill set is. I'll open the discussion by telling what my skill set is.
Lvl 5 Football Player
Lvl 7 Machinist
Lvl 2 Truck Driver
Lvl 6 Car Driver
Lvl 11 Badminton Player
Lvl 3 Engineer (Industrial)
Lvl 3 Martial Artist (Karate)
Lvl 10 Student
Lvl 8 Cleaner
Lvl 3 Writer
Lvl 6 Cook
Lvl 3 Soldier
Lvl 3 Commissioned Officer (Prestige Class
Lvl 4 Personal Trainer
Some basic rules I used coming up with these is that for each 6 months I did something, I gain a level. Except for the Student levels, which I gave 1 for each year I performed clearly above average. If I got close to the average on a given year, or below it, I gave myself nothing. I've actually been to different schools a total of 17 years.
If I had done any of my hobbies professionally, I would have made up a prestige class for it. As in the case of badminton, an Olympic Badminton Player would have been the prestige class.
For the military classes, I gave myself 1 level per phase of training completed. I never actually got any field experience. The driving stuff is for each year I've had a license and used it to some degree.
I discounted some stuff such as going to the the gym, reading or jogging, based on the fact that I think they don't actually give you skills, they give you stats.
The Writer is ongoing, as is the Engineer. I'm still progressing on those classes. To a minor extent, badminton belongs among these as well.
Now tell me what's your class/skill set?