lynaFor classes I personally enjoyed playing all the classes and did medic for a while but maybe the fact that it was always very hard to get a medic in a pug speaks of his role and maybe it deserves to take a look at him from a fundamental level? Yes you can medic but most would agree I think that playing scout, soldier, sniper, (won't speak for demoman because I always thought he had a very high learning curve in competitive and I was always trash at him) tended to be a better experience in pugs where most players were primarily concerned with practicing their own play rather than full on strategy where medics tended to be more important.
i always thought that the reason people dont want to play medic is killing people is fun