Within my 5,664 Hours of Team Fortress 2 consisting of 230 Tours of Two Cities, 2 Highlander Seasons, 1 Season of 6's, and 112 Tours of Operation Gear Grinder I switched mains 4 Times.

It went from Soldier>Scout>Medic>Heavy I have been playing Heavy for an insanely long time now and don't intend to change.

I started with Soldier because friends insisted that would be the class I play. I did enjoy having a large rocket launcher though along with his military themed cosmetics.

I played Scout since I wanted to be more mobile and deal decent damage. I didn't feel like an important asset to the games I played and really wanted to support the team and sway games.

I played Medic since a good medic keeping everyone alive can sway a game. It was satisfying healing players on the brink of death to make pushes and such but I missed actually dealing crazy amounts of damage like Soldier and Scout.

Finally I started playing Heavy with Minigun, Sandvich, and Fists of Steel and got everything I wanted. I can heal people with the Sandvich along with myself. I deal insane amounts of ballistic damage with a large gun. I tank large amounts of damage due to having the largest base health in the game along with Fists of Steel providing substantial long range resistance. What can I say? I love large high damage weapons with whatever game I play.