What I loved about was how the crew had no clue what they were doing and made everything up on the fly. They were human and flawed and genuine, which I could identify with. I still can.
Yes. I agree. I find the ENT crew to be very relatable.
I am currently watching ENT on H&I, basically watching ENT for the first time.
Like you, I have enjoyed watching the crew winging it, making it up as they travel along. The characters come across as gritty pioneer explorers.
I liked the story of "Flight or Fight", where Hoshi had to overcome her fears and had to learn to adapt to all that comes with deep space travel and get her space legs. Flawed but very human.
Also, to me, there is (figuratively) a blue-collar vibe about the crew. They seem ordinary and down to earth. I think the jumpsuits, (literally blue collars) that they wear, contributes to creating that working class vibe.
I saw "Desert Crossing" on H&I last night. In one scene, Trip hallucinated about food, specifically drumsticks, prime rib, mashed potatoes etc. There have been plenty of scenes, throughout season 1, of the characters eating, especially common Earth dishes.
The relatively plain industrial look of the interior of the ship, the crew having movie nights, eating, and stuff like that, I think it all adds up to making them seem ordinary.
And there generally isn't a pretentiousness about the ENT crew, unlike, say, the TNG ones. Picard and most of his officers have an air about them. They too often behave as though they have transcended from being mere ordinary humans.
So far, I have really enjoyed watching the series.