I'm still overjoyed because i was at my third tlm yesterday.  It was a diocesan tlm in the most beautiful church.  I talked to my mom in the car after mass about the mass. She noticed the priest didn't remove the biretta as much this time.
   Yesterday was a low mass. Father wore the biretta in, and handed it to the altar boy before the prayers at the foot of the altar, and put it back on at prayers after low mass.
  The last time was high mass, different priest, same church. However, he put on and took off the biretta a lot more. Is this just a matter of clerical style?