I thought POGS explained it very well (or was it just me?) and wasn't pompous at all.
I think Bercow's problem, if he has one, is that he likes the idea of a being a famous personality, ie enjoys the personality cult as defined:
Excessive public admiration for or devotion to a famous person, especially a political leader: 'every pope became the centre of a considerable personality cult'
instead of just doing his role of Speaker to the best of his ability and remaining impartial.
The Speaker also represents the Commons to the monarch, the Lords and other authorities and chairs the House of Commons Commission. The current Speaker is John Bercow, MP for Buckingham.
Perhaps he should have have a chat with HM first before expressing an opinion.
We certainly didn't hear or know so much about previous Speakers, although we were perfectly aware of who they were and I think most of them behaved with more dignity.