The buying system doesn't bother me.
TRADE CRATE FOR PYRO HAT!!!
TRADE CRATE FOR PYRO HAT!!!
TRADE CRATE FOR PYRO HAT!!!
THAT'S what's bothering me! It turned TF2 into Maplestory! 'Ey, you have two crates and no key? No, you don't have to buy the key. What kind are the crates? Type one? Naw, sorry, I want type two.' |-( There are 'types' now?
Valve said that TF2 is their experimental ground, something where they can put ANYTHING in and get away with it.
In most regards, this is true. Some things are so wacky that they wouldn't fit in any other game (like a fish, slapslapslap).
But TF2 was perfect where perfection is not something that you can't put something in, but you can't take anything away from. Now it's slowly starting to be a really Gigabyte eating mess of something that was so simple and fun in the beginning.