I drive a school bus so WHY would I consider another SCHOOL BUS a pleasure vehicle? We have a B+ yes a smaller school bus but its the SMALLER that qualifies it.
Some folks like the big vehicles, what is really scary is that folks are driving with AIR BRAKE systems that require some maintenance that the hydraulic brake systems dont. Also remember that after a while the air brake systems may not stop you as quick, but some of the hydraulic systems are also over matched by the vehicles they are to stop, particularly at highway speeds.
Ours while technically a C just does not have the big wind sail at the front that has to be overcome when moving and since we do not have any passengers to worry about it meets our needs.