Personally, I'd prefer that the core PHB always include Human, Dwarf (1 kind), Elf (1 kind), Gnome, Orc (of some kind) and Halfling (1 kind), with the exact nature & number of the subspecies being open.*
However, I voted "Human." Only.
I've been playing since '77 as a player and GM with enough different gamers in enough different systems and in enough different cities to find that while variety is the spice of life, if you eliminate humans, you tick off a lot of players...even players who don't normally play humans.
Even elf "fan-bois" can find fun if your campaign has something vaguely elf flavored, be it the nature lords or magical masters archetype...
But IME, nothing but humans will satisfy someone wanting to play their own RW species.
* The reason is essentially a matter of backwards compatibility: I've run a campaign dating back to 1985 or so that has been updated from 1st to 2nd and was slowly being updated to 3.X. When 4th came out, so much had been excised (races & classes) that an update was essentially impossible...and this was a factor in not embracing 4th.