So I think it's become quite clear that I really like this game.
And boy o boy has playing this been fun. I love the graphics, the style and the humor behind the game. I've really only been playing with bots, but the multiplayer is pretty fun. I've found Heavy and Scout to be the best for me in Control Point, though usually I'll disguise myself as Spy when I know I can count on my teammates to get the first control point but can't get the second. I'll just run to the second and capture it when the first one is captured. Pyro is really useful for Payload, but for the life of me I never can get used to Demoman or Medic. Sniper gets boring unless I know it's needed. I've yet to practice Engineer. Soilder is always a favorite when people don't do stuff right.
As for the questions...
Heavy is probably my favorite class, it's just fun to destroy everything.
I really like Spy's knife, it's good for both looks and usefulness.
I haven't found any hats yet.
I only have 11 hours logged, I just started two weeks ago and it's been a busy start of summer.
Refer to #3.
The Casual servers I guess? Maybe those are the Valve servers (and I bet they are), I'm just really new to the FPS Multiplayer thing.
Well, I was playing MvM and my teammates and I were pretty bad, cause we lost almost every round, and they all left until it was just me and some other dude. Then I left. So...no.
My steam name is DannyBoyy if anyone wanted to hit me up.