My first real Halo experience was playing Halo Reach with my little brother. My mom asked if I thought he'd like it as a present, and I said it seemed like it was a popular franchise.
Course, I never had played it before but it had Co Op so we played together, I ended up getting fixated and then finished campaign too. XD I played it so much I had to buy it 3 times.
It also has awesome enemy sangheili, and they became my favorite alien race. Ai and design, pretty solid.
Modding Reach is fun too!
2’s campaign expanded the scope of the Halo universe so significantly and was not afraid to try new things
Infinite’s MP is just so solid, customization and BP stuff aside, it is very well balanced, maps are great, and incredible forge maps are finally making their way to matchmaking.
I was only introducted to Halo through a friend when Reach came out. I absolutely loved it. I then played through the games and totally fell for the story. But when it came to it, I just kept going back to CE. Everything about it, the story, the aura, the multiplayer, and modding on custom edition.
3 because of the solid gameplay, forge, and the constant "live service" bungie had going on. Bungie favorites and updated Playlist meant there was always something new to try.
Additionally the friends I made along the way make it a favorite
I’d pick one from the Bungie games, probably 3. I have fond memories playing playing split screen co-op with my brother in online, campaign, and even some of the vid master achievements late at night.