Thursday is fine if you're a local (same with Friday). But if you live out of town (western NoDak, etc.) than the Saturday game is the only one that you can attend.
And besides, nothing makes a weekend like the Fri/Sat series. They just rule. Its kinda like NFL on Sundays, the consistency is just awesome. Yeah and MNF is good and all, and maybe an occasional Thur. hockey game would have the same special feel, but nothing beats the good old Fri/Sat series.