The Sangheili were my favorite character as soon as I spotted the bad-Yoink- that is the sangheili. Please also list why you like them.
My favorite one is Ripa 'Moramee because of the evil presence that he projects and the rage that fuels his fighting and also the beast custom energy swords.
I feel Thel 'Vadam is unworthy of the title of Arbiter and must be exterminated for allying with the humans(Nishum) for so long.
Well, many Sangheili were slaughtered by the Brutes, so he had no choice but to align with the humans and gain revenge! Plus, it’s not like Thel had any choice in becoming the Arbiter.
I gotta say, though, Xytan Jar 'Wattinree is my favorite! An Elite that’s over 11 ft tall and is an Imperial Admiral that commands an entire fleet, at the least, what’s not to love? lol
Half Jaw from H2
For his glorious speeches and for still kicking -Yoink- with half a jaw.
Rtas Vadum is my favorite. For one of the reasons I love him not because of his missing mandibles and such but also because he respects and cares for his grunts instead of seeing them as just tools.
Zuka Zamamee …the Spec Ops Elite who had it on for Chief in the Halo Novel - The Flood.
Why? Very cool adversary to the Chief…kind of a Zuka Vs. Chief fight! …and I like Zuka’s clever grunt side kick…forgot his name…yap yap or something.
Thel’Vadam,purely because of his relationship with the chief…Kinky…
Rtas Vadum.
Thel Vadam.
Thel Vadam is my favorite.
Ripa Moramee, the Arbiter from Halo Wars, no one dual wields Energy Swords as well as he.
Thel (Arbiter) is my favorite, but I’d like to learn more about Xytan 'Jar Watinree from Ghosts of Onyx, I have a feeling he’d be my new favorite.
Good 'ol Half-Jaw
Rtas 'Vadum
Thel 'Vadam and Ripa 'Moramee are equal, though I found Thel’s appearance in Guardians to be lacking. Ripa is badass
i love Arbiter and Half Jaw in Halo 2 
theyre just really cool
If you don’t love the arbiter there is something wrong with you
Thel 'Vadam
Jul mdama for being the first elite to think more like the humans and using their own human games against them. He was a considerable threat to humanity after the human-covenant war.
Probably Thel Vadam or Rtas Vadum
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> Thel’Vadam,purely because of his relationship with the chief…Kinky…
They do certainly seem to have their own style.