In the game I run for my son and his friends, only 1 rogue, 1 cleric, and 3 wizards out of the 18 characters (6 total different players). Ages have ranged from 10-14 at time of character creation.
For both this post and a few others who responded to my question, I find these anecdotes fascinating even if not particularly related to the thread at hand. For comparison, here is what I've seen in my two recent campaigns, which are predominantly <25 year olds (not counting me) who have never played any edition before 5e:
Main Campaign:
Dwarf Paladin - Vengeance
Goliath Paladin - Oathbreaker
Leonin Paladin - died before subclass
Tiefling Sorcerer - Draconic
Tiefling Sorcerer - Aberrant Mind
Tiefling Sorcerer - Aberrant Mind
Halfling Warlock - Great Old One
Aasimar Warlock - Hexblade
Plasmoid Barbarian - Giant
Dwarf Barbarian - Totem
Elf Barbarian - died before subclass
Earth Genasi Bard - Creation
Water Genasi Bard - died before subclass
Elf Bard - Eloquence
Minotaur Monk - Open Hand
Drow Ranger - Beastmaster
Half-elf Ranger - Drakewarden
Second Campaign:
Autognome Ranger - Beastmaster
Elf Ranger - Swarmkeeper
Hadozee Barbarian - Zealot
Warforged Artificer - Artillerist
Thrikeen Druid - Spores
Bugbear Druid - Moon
Tiefling Sorcerer - Draconic