Mixed opinions.
When I first watched Enterprise I enjoyed it. But after watching TOS, TNG and especially DS9 over the past couple of years, I find Enterprise to be somewhat... less enjoyable. I still think Enterprise good, just not as good as those series.
Season 4 was the best season for me, followed by season 1. Despite popular opinion here, I wasn't keen on the Xindi war. I just didn't like some of the recurring themes, such as the Trip/T'pol neuropressure scenes and the MACO rivalry.
Biggest gripe for me is the way the show tried to emulate "The Big 3". I'm sorry, but Archer, T'Pol and Trip don't have half as much chemistry as Kirk, Spock and Bones did and after watching the entire series, I just ended up wishing the remaining cast had more to do. I just don't think there's any natural chemistry between them and most of the time they were together, it seemed forced. Enterprise should have been an ensemble show. But despite my gripes, I do think Enterprise deserved a full run of episodes and seasons.
They didn't make T'pol intuitive like Spock.
She was a broken record at times about the time travel issue. and that just goes with the whole vulcan problem in ENT the way they made them so belligerent.
Anytime you decide you're going to go back in time and create familiar things we're used to seeing in a later context, you have the unenviable responsibility of deciding of where to introduce tension that doesn't exist in the later context AND to decide what that tension should look like. It's easier to change the apparent less-advanced technology to make it look simpler or less capable.
It's harder to do that sort of retrofusion in characterization. I'm unsure why you would want T'Pol to be intuitive "like Spock". That removes more of the tension from the character, and makes it less relevant and less necessary. By crafting a Vulcan leadership that was not connected in any real way with the teachings of Surak, it introduced a tension that allowed conflict to exist where none had in the later contexts. And, by later smartly resolving this (by having sort of a Vulcan Reformation with the discovery of the Kir'Shara) later in the series, it made the Vulcans seem more like people and less like caricatures.
So, about T'Pol - to me it seems clear why she was like a broken record, because a lot of her growth was indicative of the growth of the Vulcan leadership (both at the High Command and the Science Directorate/Academy).
As Kirk said to Saavik in TWOK, "Well now you have something new to think about."
Thanks, I never really considered the above before, it actually explains much. Having said that, I do not think Blalock was the world's greatest actress. Her performances seemed to vary between boredom and barely being able to stomach the dialog she was reciting half the time...she seemed extremely uncomfortable and awkward with her line readings, even when her character wasn't suffering from withdrawal...