I wouldn't buy a season ticket if it didn't reserve me a specific seat. I also miss a few home games because of work, usually about 6 a season, so the club would lose out financially from me.
The singing section argument about ST with allocated seats ruins the atmosphere is something I don't buy into. If the football on show was decent and exciting, the place would be rocking, unfortunately I believe it's been the poor football since we have been in the new ground that has generated the no atmosphere argument. IMHO