We can all take solace in the common struggle that we as human all face: we just want someone to boss around. That's probably a big draw for the fantasy escapism of D&D, but astonishingly even therein it's easier said than done. Pelor knows your party's an ornery bunch, and they'd rather shake down commoners for copper pieces than do anything you suggest. The Leadership feat is banned in some campaigns, and you have to be careful with your followers lest they become disenfranchised. Most campaigns don't run psionics (for you wannabe thrallherds out there) and planar binding can be a real hassle with all of the costs, exacting rules and opposed charisma checks. What's a power-hungry lunatic to do?
Fortunately, for any problem, we have undead. Order them around, use them for combat, hard labour, hat racks, you name it. They don't complain or disobey, and best of all, you don't even have to feed them. Ah, the wonders of magic. One casting of animate dead and you've got a contingent of skeletons ready to either kick ass or kiss ass, at your option.
...not that it's without its deficiencies, however. Having no intelligence or self-sufficiency feel like par for the course; I'm referring more to the fact that animate dead can get damned expensive, at 25 gp per hit die. One Turn Undead from an enemy cleric and that's all of your money and hard work wasted. Plus, there is a limit to how many you can command - 4 HD per level may sound like a lot, but the low hit points, saves and BAB of undead mean that most of the worthwhile options need HD as high as possible to make a dent.
So how can you ensure a reanimated legion is worthwhile? A gang of bloodthirsty corpses can pull apart most commoners with ease, but you're going to have to put in a little more effort than that if you hope to pit them against level-appropriate threats. Here, then, I have a short treatise on what corpses to aim for when reanimating, and how to best make use of them once they're active.