The commentary is what makes the "dull sports" brilliant, aswell as the atmosphere. The mighty Sid Wadell, and the fact that the crowd has usually had a coma-inducing level of alcohol make the entertainment in darts.
Sid Wadell - “The atmosphere is so tense, if Elvis walked in with a portion of chips, you could hear the vinegar sizzle on them."
Now, you just don't get that sort of bat-**** crazy commentary from Alan Hansen.