I'm re-watching season 3 of Enterprise with more intent this time around, and what I have found has been staggering, specifically the change in Archer's character. The first time I watched it, I was careless, I glossed over a lot, I did not notice the subtleties, but when I did, they were like bugs on a windshield -- hard to miss.
The line of moral ambiguity that Archer flirts with time and time is richly mesmerizing.
Sisko is the only other captain, in my opinion, whose character went through a hellish crucible.
The gauntlet that Archer and his crew must go through for the sake of Earth is daunting, to say the least. Watching Archer go through each episode and not necessarily make the correct decision, or even the moral decision is invigorating -- it makes him human.