Who is your favorite opponent?

I don't like playing against the same faction as you. For example, Haven vs. Haven, or Stronghold vs. Stronghold. It's incredibly boring... it's like looking in a mirror.
Especially when playing against another person.

It's interesting when different buildings are used...
for example, life against life:
someone builds infantry, and someone builds archers... It's interesting.
You need to develop a tactic to eliminate the archers as quickly as possible...