I think another big part of life would be being a doctor, nurse, pharmacist, EMT or medical specialist of some sort. They would be like healers in other MMOs, but instead of people taking damage in battle, people would get 'sicknesses' at random or from some hard to trace sources, or just from each other. It's a cheap almost artificial way to make this profession needed, but it also kinda reflects real life. In the larger game, instead of playing 'against' each other like cops and robbers, or politicians, or businessmen, doctors are primarily playing a PvE game against various diseases that spread if they don't keep them in check. Most diseases would come with a minor debuff for players, encouraging them to go to the doctor, but not making it so mandatory if they just don't feel like it or want to 'walk it off' so to speak. Having a long recovery time in hospitals could make 'death' a big time price to pay in the game, and doctors could make that recovery quicker and allow players to get back in the action faster. Doctors - The main healers. Can do the work of all the other healers, but can also act as a buff to other healers to make them heal better if they play a 'supervisor role' Nurses - Do all the work of actually applying tools to people and replenishing their health. Takes a few minutes of 'recovery time.' Pharmacists - These guys create the medicine Specialists - Special Doctors are needed for special types of ailments, and carry specific buffs when dealing with those types of problems. EMTs - Field Doctors, travel with an ambulance, can work with people in the street or bring them back to the Hospital. Note on Firefighters: Firefights are, in a way, doctors for buildings, preventing the spread of the 'fire' disease. So the same design principles could be used for that much coveted position. It's not a coincidence that EMTs and ambulances are stationed at fire stations.

So, a huge part of modern life is fetch, delivery and escort quests. Usually within a single building with a very common theme whether it be clothes, food, shoes, electronics, drinks or whatever it is that particular store offers. Retail workers moving stuff around and completing menial tasks in order to have basic money for basic things would be a really cool representation of life and add a kind of texture to the world that could make it feel really solid. Delivery falls into the same retail world, just outside, though that then could be stretched to include postal workers, pizza delivery guys and taxi drivers. Having a mechanic for that could be really cool as well. Another note is that all of these jobs could be entry level positions in corporations. Do well, get promoted to supervisor, get promoted past that, now you're a Manager - a businessman. The same mechanics of retail could also be used for nearly any kind of job where the thing being maintained is abstracted to a clickable object. Teaching, Science, you name it.