Of course, this is all personal opinion, but - The Closer is one of the most well-rounded productions I've ever watched. I'm actually not a fan of police shows. There's so many of them that are the same - same alcoholic detective with romance problems, same criminals they arrest, same storyline rewritten slightly but still too familiar. It just gets so boring. But, The Closer broke the mold, for me.
The writing was outstanding. Very clever dialogue, intense drama, quirky/hilarious humor.
The characters - the series regulars are some of the best characters assembled on one show. Each actor does an outstanding job with their character. No one over the top. Because of this show, every time I see just about every actor who was a regular and most guest actors on another show, I can't help but smile and look forward to any other roles they may play.
The storyline and direction flows so well that I honestly never drift off, no matter how many times I've seen each episode (which I'm probably on my 5th or 6th run through the series).
Kyra Sedgwick was nominated for awards many times. She won a few times, but should've won much more. She's simply amazing. Frankly, several of the other actors should've won awards.
If there are any shows with the same kind of heart and entertainment as The Closer, please leave a comment for me so I can check it out.