We've had some really good luck with visitors. Some that come to mind immediately are Fro (Missouri fan), KillerCacti (Clemson fan), Cy the Cyclone (Iowa State fan), Bucky (fan of everyone who played against Nebraska in 2011), several Buckeye fans including Muck and Coqui, several Michigan fans including MGosomethingsomething (I forget his name and I've had a bottle of wine, but he's a Michigan fan), some Iowa fans whose names escape me (sorry, guys), and several other visitors from Big Ten schools, and of course TuffTiger, as Landlord mentioned above.
The vast majority of "aliens" have been pretty cool. There are the inevitable asshats, but they're by far the minority. Some Washington fans come to mind, but most of them, again, were cool. The minority asswipes are the ones who stand out for being tools (and getting banned), but the majority of them were cool.
I think the general nature of HuskerBoard lends itself to cool visitors. The vast, vast majority of members here are really good folks, and that brings good people here. The trolls we deal with and they go away quickly. The memorable ones are the folks who stick around - and of course, they stick around because they're cool. Self-fulfilling prophecy there, I suppose.
