Just for reference, the main lecture halls are:
Kildee (Lush Auditorium)- personal favorite
LeBaron- very nice, but I don't like the two rows per level
Curtiss- really nice, split level is good for sleeping

Gilman small auditorium (room 1750? or something like that)- good hall, bad location
Carver- a little cramped but I personally like them
Molecular Biology- nice
Morrill- very nice
Hoover- good, but uncomfortable seats
Howe
Design- alright, but hard to get in and out of
Physics- nice hall, bad building
Gilman large auditorium (room 100 or something like that)- needs renovation
Coover- cramped and dark
Durham- small
Agronomy- small, cramped and kindof dark
Horticulture- very small
Gerdin- poor layout, but really nice lecture hall
Food- needs serious renovation
Marston- needs some renovation
MacKay- hasn't been renovated in 100 years