Obviously YMMV!!! You've been warned....
-PC gamers: Too much specs not enough about the actual games. Elitism sucks also....
-Mario rpg: Listen, smrpg isn't all that. Also your rpg only characters very little if any chance of branching out, especially since Nintendo is in the habit of thinning out the cast list in some games.
-Mario in general: Forgetting about older Mario games that have yet to get reboots and failing to see how almost everything is half done these days (and no my rose-tinted glasses are off, I'm well aware of the bad old Mario games but anyone should be able to see some cool/unique things a few older games did that has yet be be brought back).
-Minecraft: I learned about the game when it was in the alpha stages and bought it around beta 1.3. Back then all of this over-commercialized merchandise driven stuff was unheard of. Now I personally lost interest for reasons that had nothing to do with the fanbase but because of the fanbase I'd never attend any Minecon.
-Five nights at Freddy: Ya'll just crazy!
-Sonic: Again, ya'll just crazy! Oh, and no one likes your Mary-sue self insert Hedgehog fan-art.
And if this wasn't the video-game section, I'd have even more to complain about.....