I have been on parade for I believe seven Change of Command parades, and attended another ten or so.
Most interesting was an outgoing CO spending half hour complaining about the unit and his higher headquarters all sabotaging his command tenure.
The last two I had more influence on. Both were scheduled for 45 minutes and took less time; both were unit parades where other recognition and promotions occurred, and both incoming and outgoing COs limited their speeches to five minutes or less each.
There is something very satisfying about knowing that your last act as a CO before handing over command was to give public commendation and congratulations to someone by promoting them to Sgt.