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!
Halo CE.
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.