I'd have to say that Day9's "Funday Monday" casts are among the most entertaining videos I've ever seen. The guy is absolutely hilarious and remarkably nerdy even for Starcraft casters, qualities which don't show as much in his more analytic casts.
It really is like watching a very fast-paced sport match, except without all the constant in-your-face product branding. Like I remember college basketball used to be, except more cerebral.
I'd not played SC or SC2 much but I bought a (replacement - long story) copy last night.
