I never really caught much of the lore. It seemed like pretty standard military action stuff.

The music from the original demos was incredible. I'm pretty sure the music was what propelled the original game from meh shooter to a genre favorite.

Halo. I grabbed it on Steam a while ago, played co-op with a friend. The mooks were repetitive and the gameplay was meh.

Part of relationships is accepting people. They behave the way they do because they have values and preferences and don't always align with ours. Respect that. Make your case, but respect that they may not come to the same conclusions you do.