That's another thing - many of the "I'm not allowing X" posts here are because the DM doesn't like X, not because there's some serious problem that X poses. That seems a poor reason to me. Some folks say they don't want to put new element X into an ongoing campaign, and I can respect that. But for new campaigns, I've swung towards thinking it's bad form to disallow core options without a REALLY good reason.
At least for me, taking something away means putting something in its place.
If I want to remove Elves, Dwarves and Halflings (I personally do), then I feel the need to put something in their place to fill their archetypes. So, we have a swift, nature-venerating, somewhat fey race, a powerful, taciturn militaristic race, and a sneaky, mysterious and somewhat playful race.