Halo: Reach

Pros:

A good story that isn't difficult to follow.

Fun Gameplay

Good multiplayer with great modes.

You can create and play a variety of games within the forge mode I think; and probably have a good time with friends.

Cons:

Friendly fire. I know, Halo is about precision, but some team mates get too trigger happy, and that could be bad for the team and drive the unit apart. Instead of playing a game of Halo, depending on who you or your team members are, your group will be playing a game of revenge seeking until someone is kicked from the match.

Short Summary:

This is probably one of the best games I've played with a strong campaign, enjoyable gameplay, fun multiplayer and a variety of modes I believe you can play. The only thing about it is friendly fire; but I think you can disable that in the single player section of Reach, or you can play with friends who are serious about the game; and won't kill you unless it was by accident.