Deltiologists study and
collect postcards.
Phillumenists collect matchbooks and other match-related
items. The world’s top phillumenist has a collection of over 700,000
different labels.
Pannapictagraphists collect comic books and probably can't
even spell what they are.
Vexillophiles collect and display flags.
Plangonologist are collectors of dolls.
Arctophiles collect teddy bears.