For a different perspective, I voted for classes chosen most by primary (elementary) students, aged 7-11, as I run games as a teacher. By far the most popular with the kids is Moon Druid, followed by Monks of all kinds. Half-elves, Half-orcs and Elves top the races, with Dragonborn following close behind. One party was all half-orc.
A current (8th level pirate campaign) party is Knight High Elf Moon Druid, Noble High Elf EK, Pirate Wood Elf Shadow Monk, Sailor Wood Elf Elements Monk, Sailor Wood Elf Beastmaster Ranger (v.2), Sailor Wood Elf Moon Druid.
Another (1st level Eberron/Gobbo campaign, still filling) is Outlander Half-Orc Druid, Urchin Half-Elf Bard, Soldier Half-Elf GOOLock.
I do play with adults, too, as a shadow monk (so much fun!). We also have a Paladin, a Cleric, a Bard, a Fighter/Mystic, and a Fighter BM. Have to say, loving having that bard around dishing out Bardic inspiration all the time.