I have watched and watched every episode, several times each, and as they are repeated, over a very long period of time. There simply is nothing quite as perfect, quite as repeatedly entertaining, and the ONLY question I ever had was, "How is this possible?".
Whichever location was used in whichever episode, the same individuality shines through. Even though Lovejoy IS a bit of sharp antiques dealer he is only A BIT of...not a crook, not really a villain, just a smart lad making a few bob IF the circumstances permit.
And the other characters? Where else in the past few years has ANY series given so much balance to every member of a cast?
Somewhere at the start EVERYbody got it right, which explains why it is so unique.