I've been a big Halo fan ever since I played the demo of the first game on PC in my 10th grade science class while our teacher was doing nothing everyday. I then bought Halo 2 later, and eventually Halo 3 but did skip out on Halo ODST.
Just got Reach the other day and I have to say that it's one of the better games in the Halo series. The story mode is much darker and the characters have actual depth for once instead of a one dimensional hero who hardly talks and you never see his face and basically interacts with a bunch of aliens.
I also really enjoyed the multi player so far. I like being able to pick custom abilites on the start of the game. I usually pick the hologram for slayer fights. Defiantly can throw people off. I also like how sprinting and melee attacks are a deadly combination.