I honestly can’t pick between the remastered version or the classic. You can only find terminals using the remastered setting.
I own both, and uh, remastered edition definitely.
honestly for me its classic, I just enjoy the nostalgia I get from it.
Remastered.
I still prefer the classic one because it’s one of those few games from 2001 that aged pretty good.
With darker hard to see missions remastered but I think the Flood look funnier in classic, in the mission Two Betrayals I shoot them with a magnum and 5 seconds after, they had a little yellow flash appear on them, then a Ghost hit me. 
Honestly I would say both too. I prefer the remastered models (such as the Elites, Grunts, and Jackals, and of course Master Chief) But I find myself to prefer the look of the landscapes in classic mode. Maybe I’m just weird but I feel like Classic has better coloring.
Or, I’m insane.
I do wish that Bungie had added ambient life into the game. Like Reach, but others instead of just emu like birds.
Hell yeah, remastered.
Classic, some of the levels in remastered looked a little overly pretty. and 343 guily spark lost some of the spooky ambience when it was well lit. I really liked the level Halo in the remastered version though
Remastered
I do like both I do like classic more tho.
I love the remastered version, but more especially I love the ability to switch between the graphics whenever (and seamlessly on Xbox One). The ability to see 10 years worth of graphical improvements at the touch of a button is awesome, and it allows one to play in either a shiny new world, or a classic one that still stands the tests of time.
I love remastered
Classic. Its far more elegant.
I play halo 3 and I think I like the original better, in all the other games, I like the remastered versions, but the original look in halo 3 fits better.
classic version, the gun sounds are much better imo
Remastered because then I can play it New and Old, it jsut feels cooler that way.
Remastered - fo sho.
Remastered… however I played through the mission Halo yesterday in classic only… and it holds up LIKE CRAZY GOOD!!! But anniversary is just that little extra! 