From Halopedia, the Halo wiki
I'm a nature enthusiast, avid hiker, and long-time Halo fan. I've followed the Halo franchise since 2004 and it is among my favourite science fiction franchises. As a lore fan I wasn't affected very much by the transition from Bungie to 343 Industries, and actually prefer the direction Halo's story is going in now.
I spend most of my spare time on the Internet when the weather is bad and out in the wilderness when the weather is good. I'm usually the type of person to make friends with just about everyone I meet, both on and off the internet.
The release of the Flood in Halo: CE; the beginning of the alliance between the humans and the Sangheili in Halo 2, and the awakening of the Ur-Didact in Halo 4.
Johnson's death, and failing to save New Phoenix.