I might be in the minority, but I feel ODST is an awesome game with a great story. Yeah it's short, but it's something different for Halo and the flashback missions are all pretty epic.
Then it has Firefight, which is just so much fun. Yeah the lack of matchmaking was a huge drawback, but it's still fun if you can get a couple friends on with you.
Also, Halo 3 has some pretty good stat tracking. Go to bungie.net and you can see stats for every game you've ever played. I know Reach is going to blow it out of the water, but I don't think there's another game with stat tracking as good as Halo 3's.
Then it has Firefight, which is just so much fun. Yeah the lack of matchmaking was a huge drawback, but it's still fun if you can get a couple friends on with you.
Also, Halo 3 has some pretty good stat tracking. Go to bungie.net and you can see stats for every game you've ever played. I know Reach is going to blow it out of the water, but I don't think there's another game with stat tracking as good as Halo 3's.