The entirety of Thank You, A new year and 50000 Subscriber Special, where Mark shows just how much he's happy about what he does, and how happy he is to have his audience, and how thankful he is for all of them to help him get where he is now.
All of his "thank you" videos are very heartfelt, particularly his 1000th video special. In "Draw My Life," Mark really goes in-depth into his pre-YouTube home life and his motivation for making videos.
His video when he reached one million subscribers is very low-key, showing a montage of some of his best moments while he talks in a very low tone about how much the channel and his fans mean to him.
During his Dead Space 3 walkthrough, when who enters a bunker, he encounters Buckell who, moments later, dies from hypothermia. He expresses that he liked the character and is quite sad that he had to die. Whilst he isn't really devastated, its nice to know that Mark at least shows that he has some care for the guy. Especially when he exits the bunker, he states that he will not even try to stomp Buckells body, even though he greatly distrusts dead (or supposedly dead) bodies.
The entirety of Mark's "Farewell Charity Livestream" promotional video, put out three weeks in advance as a send off to his time spent in Ohio before moving to LA. He spends the entire video gushing about how much he loves his work and thanking the fans for supporting him since the channel's inception, and for donating to the cause of each livestream. You can just hear how much this means to him in his voice as he talks about how much he appreciates the support of his fans, and it tugs on your heartstrings to hear that, especially how much time he puts forth towards each and every video he makes. Even though he says he "feels like an old man in a younger man's body," his enthusiasm for what he does is just palpable, and it really speaks to him as a person, as well as an entertainer and gamer.
The last part of his playthrough of Outlast: Whistleblower is simply full of Mark having multiple fanboy moments over the various nods to continuity. The way he gushes is pretty nice to see.
In Off, when he encounters the Critic Burnt and realizes that it's only calling out for help and is completely defenseless, he attempts to delay the battle for as long as possible before being forced to kill him.
When Mark discovers he has to fight Hugo, who's only a toddler, his first reaction is to spam the Flee option. You can even hear him furiously pressing his space bar. It takes him a while to finally start attacking and when he does he uses his most powerful attacks, trying to end the battle as soon as possible.
During Happy Wheels Highlights #65, someone posted their own thoughts on Mark's previous video 'An Important Message', stating how much they love him and thank him for everything he's done for them. A bigger heartwarming aspect is that it was done by Happy Wheels user Caspie1405, whose levels has appeared frequently in Mark's Happy Wheels videos. Counts as a Crowning Moment of Awesome too being this was done on Happy Wheels.
It's definitely saddening to hear that Mark had been in an abusive relationship... and yet he refuses to buy into the rhetoric that "equality means both genders can hit each other", and stating that no one, regardless of gender, should ever have to be hit by their partner.
While saddening, it was pretty heartwarming to hear Mark mention his father, stating he would have loved to ask him how proud he would be for what he's done. Remember: Mark never mentions his father for the obvious reason.
His vlog simply entitled Out with the Old. It comes off as a saddening video about Mark summarizing his entire year and stating how amazing it was for his two milestones (hitting four million and then later on hitting five million subscribers), but ends with him stating how he's hoping for a new year, even stating he will put out two videos a day for his fans in order to not be so far behind from them.
What makes it so sweet is Mark insisting in the end that he's okay and that it isn't a sad video, but moving into a new journey. Seeing him throw his arms up at the end before the fade out makes it better.
There's something sweet about Mark being offended by the portrayal of him in the fan made game New Home. In the game Mark is portrayed as someone whose fame got to him and he comments multiple times that he is nothing like this.
It gets better. It turns out that the reason Markiplier (in the game) was acting so odd was that he was actually an unknown entity who had taken Mark's body. The white figure persuing "Mark" in the game is actually Markiplier, trying to recover his body from his imposter's control.
His reaction to the 6 million fan music video done by his fans is a real tearjerker, and very heartwarming. Mark cries tears of happiness, talking about how all this means so much to him, how he appreciates and loves every one of his fans for their continuing support, and even brings up his late father while mentioning his trip to the White House. Despite tears, Mark is really grateful for his community, and how much they support and inspire him to be a better person.