I find the story very deep and interesting, plus the fact that halo 5 is a very addictive game
Everything you listed
The customization reqs. Gotta catch them all 
Oh, and the game is fun, especially now that i’ve finally found the magic combination of numbers that make the controls work EXACTLY like i want them to, and the modes provide a ton of variety.
the story usually but now because of the story in halo 5, warzone is what I am here for.
Game dynamics - it still feels classic Halo to me
I’m a Halo fan
To hopefully earn that special REQ/Armor set I want to use
The story (Even if Halo 5’s was bad, it’s important to look at all the small details for information about the future.)
I am dedicated to the story and the game. I can’t just quit.
A little bit of everything. I love the gameplay, I’ve played since I was 8 years old, I love the story. The Halo universe just fascinates me and I hope it does with the upcoming Halo’s 
Nothing. Overwatch and Rocket League are keeping me away to be honest.
inb4 “yet you’re on a halo forum”
well you know what??? fine you got me. i come here out of boredom
I keep playing Halo because I grew up with it. I enjoy the universe, I enjoy the gameplay. I’m guilty of wishing to max everything, and complete everything. Though overall I have a fun time on it, plus I mix it up every now and then to be sure I don’t get bored.
The fact it is a brilliant game, I love it. I’ll take Halo 5 over Battlefield or CoD any day,
I play other games too but I mostly play halo,am a halo fan,the teamwork when playing with a team,custom game options when playing with friends/against them,the competitive side, the, gameplay, the hilarious times when randoms and friends -Yoink!- in custom games too.
Forge.
what keeps me coming back is the massive universe, one of the biggest in the video game industry (in my opinion)
Well it’s the only game I have.
I want to max out my spartan
I want Achilles
I want to see if 343i will make a better game, which they usually don’t
Mostly Halo Wars nowadays. It has more replayability after 7 years than Halo 5 after 7 months.
Halo 5 is so much fun. I specifically play Warzone and Infection like 90% of the time. Nothing’s more fun for me than to kill zombies or hunt down spartans in order to increase the zombie army and/or engage enemy spartans on huge maps while we use every REQ at our disposal to ensure our victory.
Oh let’s not forget the monthly updates, those keep me going as well.
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> I don’t come back. I’m too busy playing other events better games. (My opinion)
Heretic
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> The smooth, addicting, competitive gameplay…
Same here and i´m a huge Halofan^^
i come back for the extreme competition
A mix bewteen fufillment of a collection and people i play with