Here are my opinions after some playtesting...
Dwarves
Keen Senses: Taste- and smell-based perception skill checks are nowhere as common as sound- and sight-based perception skill checks. This need to be +3.
Hearty: This needs to scale. My 20th level dwarf fighter with a Will Save of +19 (+6 Class +4 Wis +2 Race +2 Feat +5 Resist) is always a coin flip away from falling prey to a dominate monster or imprisonment by a 20th level elven wizard (29 DC; 10 Base +10 Int +9 Spell) and would be worse off if he did not heavily invest in the near necessities of Iron Will, a Cloak of Resistance, Wisdom, and Wisdom enhancing items.
Hatred: Either the bonus needs to scale or this racial feature needs an expansion of utility beyond simply being able to hit orcs and goblins more often.
Elves
Elven Immunities: Not as all-encompassing as the dwarves' Hearty feature so the save bonus against enchantment spells ought to be higher and immunity to magical sleep effects (which are rare) do not justify it being kept as +2. It also needs to scale for the same reasons the dwarf's hearty racial feature bonus needs to scale.
Elven Magic: The Appraise bonus requires spending skill points. Not a lot of fun.
Gnomes
Keen Senses: See the dwarf entry for the argument regarding this racial feature.
Obssessive: You need to spend skill points to make use of this feature.
Illusion Resistant: Needs to be higher for the same reasons the elves immunity bonus needs to be higher.
Hatred: See the dwarf entry for the argument regarding the Hatred feature attack bonus.
Half-Orc
Orc Ferocity: This is not a great feature in the beginning and is totally oblivated at high levels thanks to all of the damage enemies are tossing out at high levels. Please replace this with something else.
Halfling
Halfling Luck: Should scale. Another +1 at level 10 looks good.
Fearless: Should scale but since it stacks with Halfling Luck, it doesn't have to scale much. Another +1 at level 10 sounds good.
Human
Weapon Training: And what happens if your class grants proficiency with all martial weapons? This needs to be addressed.
