What's wrong with homogenous races?
Nothing. It's when you have an entire homogenous race of "rare" half-elf/half-orc/half-whatever hybrids that I get annoyed. For example: Half-orcs. They're just slightly less orky orcs. Why not just let us play as orcs? Or half-elves. If elves and humans hate each other so much that half-elves are sooooo rare, why is there an entire self-supporting population of them?
D&D doesn't let you play orcs because it's too namby-pamby. Seriously, you can't just be an orc because they're the "bad guys." Luckily there's
The Burning Wheel.
The half-elves thing is especially stupid, considering that in D&D's prime reference for the elves thing,
Lord of the Rings, half-elves had to choose to live either as elves or humans (e.g. Elrond chose to live as an elf, but his brother chose to live as a human). They weren't somewhere in between.
Don't get me wrong, I like D&D every now and then, but a large portion of it makes my eyes roll uncontrollably.