As a person who watched all seasons when they first aired, its still one of my favorite, and usually the one I go back to when i watch trek reruns.
As for fandom, We have an Enterprise section in this forum, if you have a question, just ask, or want to comment on other threads, please do.
I'd gather that most trek fans have seen it, but alot still rate it as there bottom pick of series, well atleast before the current era, to me Disco and Picard are WAY below Enterprise. Even Voyager is below enterprise for me.
Characters were likeable, though like Hoshi and Mayweather, criminally underused. ( though not as much as the Disco bridge crew..

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But as said, it was a bit of a waste of a good concept, Early pioneering days, less technobabble, a Gunsmoke in space as it were. But was laid out like a continuation of the Tng/Voyager template for atleast the first 2 seasons. So people bailed, and it got canned. Shame really, it was leading up to the Romulan war, a time setting that I think is just Begging to be explored.
There have been the ocassional "Continuation" thread, and as I am supportive, I doubt it'll happen, the ones in charge seem to not care for the era, except for the occasional reference. But I'm hopefull.