Hadrurus arizonensis, Desert Hairy Scorpion, Giant Desert Hairy, you get the idea.
Substrate: a few inches sand that has been dampened and left to dry under a heat lamp for a few days.
Humidity: low to moderate - around 50 - 55%. No water dish needed, as this is a desert species, and it has adapted in a way that allows it to receive all of its water needs from its prey.
Temperature: 80º to 90º Fahrenheit
Decor: whatever is aesthetically pleasing to the keeper (see below)
Preferred hiding spot: burrows, not much of a pet hole in my experience, they come out around 65% of the time (yes I did the math)
Communal: not sure, I've only ever kept one.(*added by abyss* Not communal however some have kept them in large enclosure with little to no problems. Best success is if they are all adults)
Temperment: mildly agro, they won't try to snuff you out, but they'll give a nasty nip or sting.
Venom: mild. non lethal, but you don't want it to ever happen again. Like a very, very angry hornet sting.
They aren't as docile as an emperor but not as agro as a heterometrus, somewhere in the middle (leaning more towards heterometrus). They're actually a little easier to keep than the golden standard P. imperator. In fact, I'm getting one for my Girlfriend to get her into the hobby!
-- Don't worry if it stops eating. Scorps have slow metabolisms and sometimes go months without eating for no real reason.
-- A new scorp likes to explore its habitat. My emperors wandered around lots at night when I first got them (they also took about a week to start a burrow). So, attempts to climb the glass are nothing to worry about.
-- "A scorp that stays in its burrow is a happy scorp." 'Nuff said. If you like seeing your scorpions, make a "starter burrow" against the side of the tank. They will most likely hang out there and you can see them while they feel secure and at home.