Wargaming makes me peaceful!
I was left wondering what difference it makes as the interceptor when given the choice to attack upon intercepting or being the defender? Can anyone enlighten me please?
When intercepting as an attacker a player risks losing his champion status if he successfully intercepts another champion who is not the current usurper. But if he does so, the defender (the active player in our example) will only be able to refuse battle on a successful avoid battle die roll. So it's a pretty useful tactic when you want to deprive your opponent of his automatically-successful-refuse-battle option and pin him down in order to force an engagement which otherwise could be hard to secure...
Hope that helps!