Crazy-Prepared: Strife prefers using a bundle of hard-saves over quick saves in his Fallout 3 playthrough, as it is in the event of the game crashing (Which was supposedly more common at the start of release). He also tells a story of how he once found a Cherry Bomb in a toilet bowl, and since then searches every toilet he can unless he's full on weight.
Strife's profile picture on YouTube had for a long time been his face, but always in shadow. When asked if he'd ever show his full face, Strife thought about it before rejecting the idea.
His profile picture is now a cartoon rendition of his face.
Now fully averted, as the Yogscast wiki has a photo of him.
Hypercompetent Sidekick: One of the few members of the Yogscast who isn't very quirky, and thus his ability at games isn't overshadowed.
Let's Play: Strife has done several playthroughs, including a three-part LP of Oblivion (Only doing side-quests that earned places in the journal), to help celebrate the release of Skyrim, one of ZombiU, which lasted almost 40 parts before Strife finished it, one of Fallout 3, which is bi-weekly and released on Saturdays and finished on December 7th, 2013, and one of the Skyrim DLC, Dragonborn, with a release date of once every two days (Finished in Autumn 2013). The last is unique as Strife is going in blind and without any knowledge of the area outside of having gone there in an expansion pack for Morrowind.
Lock and Load Montage: Every weapon in his guides to the important weapons in Fallout New Vegas has one of Strife loading the gun/pulling out a weapon and pulling off a V.A.T.S shot of a foe dying.
Morality Chain: For AlexParvis. Half the reason for teaching him Blood Magic is Parv will probably cause serious trouble if he tries to learn alone.
Mr. Exposition: His "designated role", given his number of tutorials. Invoked in his Minecraft tutorial introductions, when he notes the lack of an official, up-to-date tutorial.
Mysterious Past: His Minecraft persona, who apparently went to college with Lewis Brindley and Sips, owes Lewis "a favour" of some kind (leading to him getting roped into teaching Alex Parvis Minecraft). He also appears to have dabbled in Blood Magic... "What happens in college stays in college".
Self-Imposed Challenge: Strife enjoys these to spice up the video, as otherwise he'd likely just mop the floor with games.
His Fallout 3 playthrough has one of these- Strife chooses to specialize in Big Guns and Explosives, while keeping his Repair skill at around 40. He is not allowed to increase it unless he finds a Skill Book.
Dragonborn also has him playing as a rather low-level mage who specializes in Conjuration- specifically Bound Swords. He eventually was forced to (offscreen) join the College of Winterhold to acquire more high-level gear because he kept getting his ass kicked by a boss.