There have been shining examples of Me Too Syndrome that I can mention. One teacher in my classes who used to work in the games industry remembers that when The Matrix first came out and was such a huge hit, the people who ran the design team were all repeating, "Make it more like The Matrix, make it more like The Matrix," on and on for ages. Something's a hit, so you try and copy it.
Same with the people trying to rip off Pixar by making a ton of CGI flicks about talking animals with celebrity voices, and covering up their complete lack of writing talent by substituting pop-culture references for humor. News flash, people: The reason Pixar's movies are so good is because they have GOOD WRITERS, not because of the fancy graphics.
And yes, I realize there is nothing new under the sun, but you could at least try and copy the GOOD elements about something, rather than just jumping on the latest pop-culture bandwagon without giving the slightest thought to if it makes something good or not. For just one example, the reason that so many shooters LOOK like Halo and/or Gears of War is because the mass market they are targeting only looks at the graphics before buying the game, so if it looks like Halo, they'll assume it's a similar game, and be all over it.
The fans are not immune either. I am so sick of idiots shouting "The cake is a lie" whenever anyone within earshot mentions cake in any context whatsoever that it's almost ruining Portal for me. After the Borat movie came out, I couldn't go anywhere without hearing someone quoting him in that ridiculous accent.
As for Yahtzee's fans, I have a sterling example of Me Too Syndrome: In the Brawl and Mailbag comments threads, the people who agreed with Yahtzee outnumbered the people who disagreed with him by about a 4 to 1 margin, and yet were still complaining of persecution by an endless army of Brawl fanboys who had allegedly descended upon the thread. Why? Because Yahtzee had said there would be a huge reaction.
Same goes for JRPGs. Granted, some people already hated JRPGs before, but how many of them ever used the acronym "JRPG" before Yahtzee said it? How many of them insisted on thinking of it in terms of "JRPGs vs. WRPGs" until Yahtzee did? And how many of them started treating FFVII like the be-all and end-all of JRPGs?