SPOILERS:Halo Reach, gave good memory's but left a lot to be desired!
Now to the review. I thought the story in Halo Reach had a great premise but it lacked in character development, generally that is not a huge deal in FPS but when the game was advertised and set up around 6 Spartans, I would like to have learned more about them and their depth. I also thought that the ending left many unanswered questions; How did Master Chief get on to the Pillar of Autom; If Cortana chose Noble 6 what made her then switch to Master Chief; If Cortana was Alien A.I. how come that just comes up now and not before; I was mostly upset, I wanted to learn more about Master Chief in the ending and was left with nothing; I would liked to have known what happened to Noble 3 and Dr. Hasely.
All in all the game is fun action packed and gives a sense that you are fighting a losing battle but it just lacked depth to really pull me in. Multiplayer is tons of fun. the new armor variants add re playability and fun to the mix. Overall, I enjoy the multiplayer, I have not played it as much so will hold critiques of it for a later time.
Bottom line, a successful game that could have been GREAT but ended up being good.