(See original post here made by u/Ardusk, https://www.reddit.com/r/halo/comments/31h1xh/things_i_want_in_halo_5s_character_customization/ )
I am posting because I strongly agree with every point here
Ability to choose your character’s undersuit color (including black)
Master chief’s sage armor color from campaign that matches other UNSC stuff
Non battle damaged version of Chief’s redesigned Mark VI. (like in the prologue).
Ability to hide your emblem
Ability to choose where your emblem appears on your armor
Braille on armor to change depending on your service tag
Ability to change the color of the armor’s lights
Ability to get rid of secondary colors without having a shading difference on secondary color spots in game
Voice options
Have I mentioned black undersuits?
Different armor sets to have different undersuit designs (for example, if Halo 3’s Mark VI came in exactly as it was, the old undersuit would come in too.)
Wort wort wort
Detail color like in Halo 3
HUD color options
HUD design options
Plenty of armor sets
Black as a color option
All of Blue Team’s armor
Locke’s armor
Halo: Reach ODST Helmet (from KnavishPlum169)
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> Wort wort wort
Of all the points this resonated the most with me.
> Ability to hide your emblem
What? Who would want to hide their emblem. I mean you do obviously but why?
I really like the idea of being able to place your emblem any where, maybe even change its size?
This list does sound cool though
all you missed was the Halo Reach ODST helmet 
“love that helmet” but, that is what Nightfall is for.
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> Voice options
What did you mean when you said “Voice options”?
I’d like to add to the list, custom celebrations. Rather than having your spartan high-five all the time, we could chose something else, even friend celebrations; So when you’re grouped with one or more friends, you could all have a specific celebration. Other than that, great list!
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> What did you mean when you said “Voice options”?
Having a number of voice options we could chose, for call outs. For example, choosing between Steve Blum, or John Di Maggio as your Spartans voice.
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> Having a number of voice options we could chose, for call outs. For example, choosing between Steve Blum, or John Di Maggio as your Spartans voice.
John Di Maggio - So our Spartans would be running around drinking alcohol saying “Bite my shiny metal -Yoink-!”
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> > Having a number of voice options we could chose, for call outs. For example, choosing between Steve Blum, or John Di Maggio as your Spartans voice.
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> John Di Maggio - So our Spartans would be running around drinking alcohol saying “Bite my shiny metal -Yoink-!”
Because who wouldn’t want that? Haha!
Great list. I would love to see a lot more armor customization in Halo 5. Enough so that no two Spartans are the same. Also, I want a large amount of armor pieces that require actual challenges or achievements to unlock them and not just rewards for leveling up.