When I stepped into Memorial Hall, I felt that nothing has changed there in quite a while. I liked that. It has a very mature and stately feel to it. Very ornate, interesting rooms and architectural features. Very visually appealing, the perfect subject for some panos. There is also a recent documentary video project about Memorial Hall, directed by Roberto Gayol, that can be viewed here.
Also be sure to visit the American Classical Music Hall of Fame when visiting Memorial Hall. You can find it on the second floor by the auditorium.