Autzen is tough for several reasons. It is not huge stadium, but the way it is constructed there are only a few feet separating the fans from the field. The fans are almost on top of the players and unfortunately there are frequent exchanges between opposing teams and fans. I'm sure the bowl shape has some accoustic effect that amplifys the noise. The stadium is always at 105% capacity so the fans are passionate. Yes the weather can be bad, but no worse than Pullman, WA. Ultimately though the most important reason is that the UO and coach Belloti have fielded competitive teams, the last year being an exception. Some links
http://www.collegegridirons.com/pac10/AutzenStadium.htm http://www.msnbc.com/modules/sports/...s1b1&0sp=s1b10 (old link)
http://www.rivals.com/content.asp?SID=1014&CID=444097 (more current)