Yahtzee is funny to watch in terms of seeing somebody find interesting new ways to rant very quickly but his reviews often leave something to be desired. There seems to be an idea amongst some that if you admit you are heavily biased then you can go about saying heavily biased things without issue.. This is not true, while everybody has a bias you don't get a free pass on it just cause you own up to it.
Case in point his reviews of MMO and JRPGs, he just doesn't like that kind of game, which is fine (honestly its been a long time since I played either genre either), but his almost always rags on this that are at the very core of those games. It would be like if I said that I hate Romantic Comedy #112344 because its just a sappy love story about two people who 'couldn't be more different' but then fall in love anyways in a series of comedic events.. Sure that may be a valid reason not to like a movie but that is what a romantic comedy is about.. Or saying I don't like Horror Movie #12223 because it was filled with tension and had a lot of gore in it. At some point you just don't like the genre and even the best game/movie/book/etc of that genre just won't appeal to you.
A few other points mentioned in this thread:
As for DF, I love DF because it is one of the few truly immersive games I've played in my entire life and certainly recently and immersion is what I chase when it comes to gameplay. Don't get me wrong, I can enjoy a game that isn't immersive, I just won't enjoy it for as long or possibly as much. But as a game DF suffers from a terrible interface (sure some people here can brag about not using any third party programs but I'm guessing most people do), and unintuitive gameplay features with no in-game or even game-sponsored help for them(c'mon, anybody here not had to look up how to do something fairly basic on Magmawiki or on the forums?). That said it is 'saved' by its community. If nobody had ever created Dwarf Therapist, or made a video tutorial of the game, or wrote long epic stories on LetsPlay, or created and updated a massive wiki style help manual how many of us would be playing this game right now? Be honest, even if you no longer need those things now how many of you would have ragequit long before getting the hang of it without those things? Heck I still use therapist and while I 'can' play without it its far less fun.
I love Dwarf Fortress, Its one of my favorite games, but its got flaws. Now maybe 'its in alpha' but they are still flaws. I have full faith they will be worked out on their own over time because, frankly, Tarn has done an amazing job with this game in the time I've spent with it, but there is no point pretending they don't exist or acting as if the fact that its in alpha means we shouldn't bother identifying them as flaws. Saying something is in alpha or beta is a footnote, an explanation of why those flaws are there and some kind of insurance that there is more development planned.. But if one were to review the game it would have some glaring issues that I think become less obvious once you get the hang of it.
ETA:
As for comparing Dwarf Fortress to Minecraft.. They are radically different games. I played Minecraft for a long time because it was a fun world to explore and you could create all sorts of things and then share them with others online, but once you got your fill of that there wasn't really anything left to do. DF on the other hand I've been playing for years and still haven't done much of the stuff you can do with it (to be fair DF has been out far longer then Minecraft). I like DF more then MC but I still think MC is a great game and I've gotten a lot of enjoyment out of it.
-MB