As of most people It's going to be a team effort and most people I hope will change class depending on the team situation.

I'm be a medic on this one because been a medic is an inportant asset to you're team as the other classes in my opinion but if my team needs an engineer ill switch to help the team out and win no matter the cost

True medics are very nice to have and engineers are a neccesity at most points, but switching between all the roles will make it harder to master. :spotted owl: A person who always plays medic will do better than a person who switches between classes most of the time.......however, you get more fun if you play all 4. Just something to consider.

A person who'll play all four classes about equally will as helpful to the team like someone who mastered only one class.

I have no idea who you would be mentioning. Want to hear something interesting my most played Tf2 class is Engineer then Spy. Why? Spies are only needed for sapping and stabbing. Engineers are always useful for your team.

I'll play whatever is needed at the time. Either that or be a medic because I love saving people. I tend to take a lot of bullets to the face and it would be nice to heal myself too.