I think
Falcon Crest's theme had more drama and had more of an epic quality to it which I think fit better with the show. The
Dallas theme was great but it had more of a jaunty and light feel to it which I didn't think fit the show quite as well.
The Colbys, although I wasn't a great fan of the show, had a great theme. Loved how the first bars were the same as
Dynasty, showing the connection with that show, before going into a really great tune.
The absolute best prime time soap theme ever though was the UK show
Crossroads. Such a clever piece of music. It starts with one tune, then switches to another before both tunes are played simultaneously and then we hear the 2 tunes separately again. Both tunes are memorable and each one represents a road that crosses the other which is reflects the title of the show.