Favorite: Halo 1 Flood Surprising as it is, I really think they were my favorite. There was something about the way the battles went that was... poetic? I don't know. There were never lulls in the fight, but you always had an option to create breathing room (pop a carrier form, set off that stack of grenades that's been piling up, fire the shotgun between groups), which created some of the best flow the series had. You could go for minutes without taking damage, but slip up once and it would all be for nothing. I guess the Flood were the only enemy that really seemed as chaotic as the Master Chief was. Least Favorite: Halo 2 Drones. -It was easy enough to avoid getting killed by them, but you had to drop them all to progress (with one exception being on The Great Journey, as this was the only time you encountered them as the Arbiter, and could just cloak past), which generally meant you performed the cover-shoot-wait dance for about 45 seconds. -Between their numbers, the distance they hovered at, and how much damage they could take, an encounter would generally drain most of your BR/Carbine shots. On top of this, there was no way to use shots more efficiently. Even the much-maligned Halo 2 Brutes were four-shot kills if you got the hang of it. In fact, this was the only Halo 2 Covenant enemy that couldn't be headshotted (with the exception of the hunters) by precision weapons. I'd often find it more expedient to use my sniper ammo on them than on "tougher" troops. I was extremely glad to see headshots become possible in Reach. I also remember reading in a magazine before launch that some drones would carry beam rifles. That would have been hell.