I loved the team of Lisa Vidal and Blair Underwood the most. They have such amazing chemistry together. You could really forget you were watching a tv show and actually believe they were real cops in most of their scenes.
Hagar and Topps were another great pair. They provided some great relief from some of the more tense scenes. And poor Hagar - imagine being stuck with that naggy wife!
Gayer had a lot of depth and emotion, but sometimes came off as a little whiny. ((But really, who could blame him, he was going thru a divorce, sold his home and all.))
Marsh is the kind of cop I would love patrolling my street. Smart (except with the ladies), seasoned and calm, he is the backbone of the team.
Cole Hauser is a god actor and I love him in the movies he's played in, but I really didn't care for his character in the show. A little too hit-headed for me.