I go to tournaments to play different people. Admittedly, I tend to win, but that's because I don't just make a bum rush with my Marines. Almost everyone with Space Marines just moves forward, throwing tactics to the wind. If you actually play a tactical game with them, though, they're bloody amazing. I've never been accused of being cheesy in a tournament-- in fact, I tend to pick up "best army." Proof that there's more to a tournament than "just winning."