I been towing for several years, its a good time, I definetely reccomend it.
What do they look for? You cant be timid when it comes to that kind of flying. You also cant be stupid. It is a safe environment, as long as YOU make it safe. If you do it dangerously, you will likely suffer the consequenses.
I was hired on with a company, and just a few weeks before I showed up, a guy dragged one through the tops of the trees becuase he turned too early, he did about a 3/4 turn and went straight in, dead!
You always leave yourself an out.
I have a few eye opening stories from my years of doing it, some I provoked, some I didnt.
All in all, I love it, its the most fun I have had in an airplane, and the most bored, mostly fun though.
What ever you do, dont get caught up in this scam where you get charged $3000 for training, thats a bunch of BS.
It dont take long, you usually will come around in about a weeks worth of pickups.
Go for it, good luck.