What would you do with an army of minions who would do whatever you tell them?
Why, take over my immediate surroundings, of course, and if I feel like it, progress to bigger targets. Start with the city I'm living in, then the county, then the state, then the country...you know where this is going. I'd also use them for an idea that's been cooking in my head for a while. Plus, I'd follow the Evil Overlord's List and be a benevolent boss.