Kohl Center
I did not go to the game tonight, but I've been to a couple games there in the past. (My Father was at the game this evening and he commented on how wild it was to see so many people head for the door at the 3 minute mark when Wisconsin led by 10. And this is no shock, but he is convinced that Bo Ryan's insistence on berating referees has ushered in a culture of whiney-ness at UW ball games. The fans get right behind Bo and scream their cause ad naseum.)
The Kohl Center can get loud. But not nearly as loud as the Fieldhouse where they used to play. It has more seats and luxury boxes allowing UW to make more money. But, like you said, it is much more sterile than the Barn. In my opinion, UW sacrificed intimacy and history for $$. (There may have been some other issues with the old Fieldhouse as well. Not sure on that.)