I will admit that I only started watching the series because I caught a pic of Jeri Ryan in a magazine and after I put my eyes back in my head I began watching, I thought it was a pretty good show personally.
If I had one complaint with the first three seasons or so it was that their
message episodes (and that was a few) were quite often laborious, they would play out with some modern day moral parallel that was rather easy to understand but they would just bash you over the head with said
message as if the viewer was a moron and couldn't understand...like
"DO YOU GET IT!?!?! IT'S A MODERN DAY PARALLEL!! DO YOU GET IT?!?!? HUH!?!?" 
Apart from that when they were on their game it was a very enjoyable show with good characters.