Been part of NEB for 7 years,and i'd be quite interested in knowing what other peoples favourite brands are/were?
Mine 
Citylink (Gold)
Loop (Black)
Nine (Purple)
The Orbit
The Lime
Saltwell Loop
GNE Corp Livery (2019)
Pink Panther
Coaster 2013 & 2021
North Tyne Links
Those are just a few