One thing I rarely see anyone mention in regards to the AVGN, is the reason why he was endearing in the first place.
As far as I'm concerned, The Angry Video Game Nerd (initially called The Angry Nintendo Nerd) was funny becuase of one single reason: he reviewed NES-games, of all things, in a deeply upset and emotional manner.
What James Rolfe and Mike Matei did when they created the character of The Nerd wasn't some sort of nostalgic, "legimiate, earnest review" of games, but rather a character that was so pathetic that he actually reviewed NES-games in the mid- to late 2000's and early 2010's, as if someone gave a shit. Who in their right mind gave a shit about "Simon's Quest" in 2004? Who actually cared about The Teenage Mutant Ninja Turtles for the NES back in 2006? No one, of course, except for actual NES-nerds, which was the main draw of the humour.
I feel like people got too hung up on the "angry" aspect of the reviews, instead of the absolutely ridiculous notion of earnestly reviewing fucking NES-games in the mid- to late 2000's and early 2010's. That's where the comedy actually came from: by reviewing absolutely obsolete games that no one gave a shit about (but also had nostalgic memories about), and getting worked up about it to boot.
Other than the first couple of episodes, I never really got the appeal of the AVGN. A friend of mine said that he found "the adventures the nerd has in his basement" to be funny, but I just never got it. The only funny aspect of the reviews came from the fact that a fucking nerd thought that angrily reviewing NES-games in the 2000's and 2010's was a solid idea. It's a ridiculous premise, and that's where the humour originated.