Infernal Teddy said:
Any new races, or just redoes of old ones?
See, specific questions like that would serve you better than just asking folks what they think.
Races of the Wild is a good book IMO. It covers halflings and elves, and introduces the raptorans. The raptorans provide a campaign with a solid approach to a flying race that's LA +0. In essence, a raptoran glides at first, then as it gains character levels it gradually develops sufficient wing strength until it hits 10th level, at which point it can fly as easily as humans can walk or run. Lots of good feats, and there's coverage on catfolk, centaurs, and gnolls (with the latter two served up as racial classes playable from 1st level). I particularly enjoyed the equipment section. Good book for archers; lots of trick arrows, and a bow that's sturdy enough to clock somebody with (wieldable as a quarterstaff). Has good feats, including some great tactical feats.
Races of Stone is also pretty decent. It covers dwarves and gnomes, and introduces the goliath. The goliath has interesting flavor, but mechanically it's overgunned to hell and back, even with a +1 level adjustment. Good book for tanks; lots of different suits of heavy armor and specialized shields, and feats that improve armor and shield use (at last we get Exotic Armor and Exotic Shield Proficiency feats).
Races of Destiny seemed pretty pointless. It doesn't tell you anything about being a human that you didn't know already, and it doesn't have much to say about half-elves or half-orcs. The illumians are like a lot of classes and races today: their existence is purely mechanical in nature. No new equipment.
Don't know anything Races of Dragon or Races of Eberron. Wouldn't mind hearing more.