They're remarkably friendly, I always think of them as the attention whores in the reptile house. ^_^
(Just wanna let you know, I had one for about a year and it ended sadly. The best I can do is let you know what I was told.)
For the most part, they're not too hard to take care of, but you have to be consistent. You'll need to get soft shell crickets or meal worms from your pet store. You can raise your own (keeping both types of bugs can smell) but you'll want to be fairly close to where you can get more of them readily enough. Feeding them regular black crickets was bad for their digestion (when they get bigger you can probably dump household spiders and whatnot into the tank). I had to dunk my crickets in calcium powder before I gave it to the bearded dragon. And you'll want to make sure you have day and night lights at the top of the tank. These are important in the lizard's growth and body maintenance.
At first, I had a fuzzy green mat at the bottom of the tank, but my little guy kept getting his little claws stuck in there when he was chasing bugs, so please get a different flooring than that, lol. Cold blooded animals like to have a rock in there to sit on, I actually had a heated faux rock I switched on occasionally (the heat was warming and said to aid digestion).
The younger the lizard, the more difficult it is to raise it. I'd recommend you get one at least a year old, just to take some pressure offa you. I actually had a small iguana before the bearded dragon and that didn't go so hot either. >.< If you little guy looks sluggish, don't waste time to try and figure out what's wrong. Asides from that, buying and reading a good book on bearded dragons can't steer you wrong, eh? ^_^
Good luck, I hope you get one (or a pair, so cute!) and it works out splendidly. Keep us posted on the getting one/not getting one eh? ^_^
-An