I don't know if it's just me but when I come across Trek on tv I just think - 'so what' and usually give it a miss. Maybe it's due to far too many showings here in the UK (the main satellite/cable channel has shown all of the Treks every day at least twice a day for some years now), and maybe it has less relevance to me now than when I was a kid...
I do remember though a time when the UK only had the 4 terrestial tv channels, and I'd look forward to BBC2 showing TNG for the 1st time - the anticipation and excitement was too much - another new Trek ep every week, all the way through to DS9's end.
For me, and please don't take this as bashing VOY, I enjoyed the 1st 4 seasons but it got a little repetative and seemed to have lost it's premise - it had all the ingredients of a good show, but didn't quite click in the way the previous Treks did - it seemed that the Doctor and Seven were doing storylines very similar to Data's in TNG - understanding humanity and conquering emotions etc. In the last few seasons it seemed like it was a Janeway / Seven / Doctor show - with little for the other characters to do or develop further.
Now, I'm not opposed to Seven having a lot of screen-time - she does have intriguing qualites about her -though I was a bit of a Bey'lana fan myself, and was a bit miffed she was underused towards the end.
As for ENT - it doesn't offer much new - it could well be stories for any of the other Trek crew, there is no evolvement from the TNG or VOY way of doing Trek. They are still playing it safe format wise - raise shields, beam up, fire, viewscreens etc and at the end of the episode the captain is right... It doesn't really have a premise - we know that certain enemies can't be killed or certain events can't happen, and yet it won't take a chance and have a risky or controversial storyline relavent to life today which would give people pause for thought.
I hope it gets better, and when it ends people will look forward to a new Trek show in the future- though give it a few years first...