I’ve now watched the complete seasons 1-4, and have the following comments.
I actually preferred the theme before it got jazzed up for season 3.
I like the mirror-universe Ensign Sato. It’s amazing what a small make-up and costume change will do…
The final episode sucked. The penultimate episode on the other hand would have made a perfect series finale - it had a poignant storyline, placed the crew at the centre of a historical event etc.
Lots of storylines were left frustratingly open by various episodes - what happened to the former Vulcan Adminstrator? Did Archer command another ship, or accept promotion? Why were the Xindi never heard from again?
The most frustrating thing though is the price Paramount put on all Star Trek DVDs. RRPs of £85-£90 are just too high. Even though play.com discounts to £55-£60, they are still ridiculously expensive. grr.