Still...having big mercenary armies just takes away some of the fun of the individual races, dosen't it? Being human or elf and all orc armies...there's just something wrong about that. While it's nice to have a few weird mercenaries, you shouldn't depend on them.
And as for the mercenaries of your own race: what's really the point of that? You pay gold for units you would of had to pay other resources for. I think mercenaries should be handled like in Medieval Total War 2: where they are more expensive than regular troops, but are handy when away from home and you need more soldiers right away.
That was so funny, I laughed twice.