IMO (as DM) only do a multi-page history if you can do it as an entertaining narrative the DM will find interesting to read. Otherwise stick to 1 page of A4.
One thing I hated running PBEMs was people who used the same 12-page background for _every PC they played_, ie they played the same PC in every game and the poor DM had to cope with this huge tedious background for some 1st-level half-orc.
One thing I hated running PBEMs was people who used the same 12-page background for _every PC they played_, ie they played the same PC in every game and the poor DM had to cope with this huge tedious background for some 1st-level half-orc.