From Halopedia, the Halo wiki
December 29th, 1994
I've been a Halo fan since 2007. Along with Star Wars and Battlestar Galactica, it's probably my favourite science fiction universe. This is mostly due to the lore, since I'm not a fan of FPS games. A Halo RPG would be pretty awesome.
Star Wars, Jurassic Park, Harry Potter, Lord of the Rings
Star Trek, Battlestar Galactica, The X Files, Falling Skies, Agents of SHIELD
Halo, Mass Effect, The Elder Scrolls, GTA, Spore, The Sims
I like the scenes from Halo 3 showing Human/Sangheili interaction. Hopefully we'll see more of it in the future, since I'm pretty tired of seeing enemy Sangheili.
Well, I really don't like the "humans are special" trope, so I hope my suspicions that Halo is heading in that direction don't pay off.
I think it would be cool for the Halo franchise to introduce new alien species. Considering that the galaxy is so vast, I doubt the UNSC and the Covenant are the only contemporary factions out there.