It is identical to watching traditional sports (NFL, NBA, football, etc). Why do people watch those?<p>The commentary is definitely a big part of the appeal. The strategy, the luck, the skill, the occasional swing at the last moments, and the drama (or metadrama).<p>I cannot say I like watching every game stream, but certainly watching Starcraft II with people like HuskyStarcraft commentating is pretty entertaining.<p>Each to their own however...