I'm making a 5e world and I don't think I want multiple subraces for each race. So, given that, which subraces do you find the best at suiting the archetypes of the race while also having solid and/or interesting mechanics?
Dwarf: I'm partial to Hill Dwarf as I find it far more versatile than Mountain Dwarf.
Elf: I can't decide whether High Elf or Wood Elf is more fitting.
Halfling: I don't really have a preference, but I've only ever seen Lightfoot in play.
Gnome: While neither is among my favorites, on the mechanical side, I like Forest Gnome way more than Rock Gnome.