I was talking about that the other day with someone. I rewatched the first season and a half or so, and I was really enjoying it. Not a lot of torture going on, though certainly it appears. And to my memory, the latter couple of seasons were actively addressing in the show the dangerous issues with Jack's recklessness. I recall a terrific speech from Kurtwood Smith, who was initially portrayed as some anti-Bauer bureaucrat but actually was handed some powerful things to say against torture.

So was it just seasons 3-6 where Jack is a vicious torture bot? Weird how memory is. I have too many other shows on my plate to dig into this solely to see the amount of torturing he does. Though I do recall he kills something like 200+ people over the 8 days of the show, which is quite a rate...