Man, launch day was a fucking disaster for me, my Wii U's OS was slower than a fucking PS1, and I got crashes a LOT. But after getting my Nintendo ID, its actually been smooth sailing, so thank god for that! I have 4 Wii U games at the moment: New Super Mario Bros U, Nintendo Land (came with the system), Scribblenauts Unlimited, and Nano Assault Neo.
Anyways, after playing tons of New Super Mario Bros U (I still have to finish challenge mode as well!), I can safely say that this is my favorite 2D Mario EVER! The level design is about as brilliant as New Super Mario Bros Wii, and of course the return of the world map is welcome. The real winners here though are the 5 player mode and challenge mode. Over Thanksgiving weekend I played 5 player with my friends, and oh jesus its even more chatoic than New Super Mario Bros Wii. We had a rule where anyone who got a game over had to switch with the person using the gamepad... which meant that anyone who was placing blocks were HUGE assholes. With the gamepad you can ruin people's trajectory and make them fall into pits, trap them, destroy power ups, ect. The purpose of the mode is to help the players, but fuck that, being a dickhead is much more fun =)
Challenge Mode is really one of the most amazing additions ever to the Mario series. I heard some reviews compare Challenge mode to coin rush, but actually that's what Boost Rush Mode is like (more on that later). Challenge mode is basically a mode where you have to complete stages in special ways (and often times, these are original stages too!). At first it starts out easy, but when these challenges get tough, oh Christ they get brutal. Seriously challenge mode makes New Super Mario Bros U the most challenging Mario game since Lost Levels, and that makes me extremely happy! And to make the deal even sweeter, there are apparently 80 challenges!
Boost Rush is sorta like Coin rush in some ways. The idea of Boost Rush is that every stage in these packs are auto scrolling, and you collect coins to speed up the scrolling. Also, unlike Coin Rush, there is only one randomized pack, and in total there are 8 packs. I actually like this a lot more than New Super Mario Bros 2's Coin Rush because Boost Rush REALLY changes the way you play the courses. Trust me, courses are way more difficult to clear without losing a life when they are auto scrolling!
Honestly the only 3 blemishes that annoyed me were: The lack of leaderboards, recycled music AGAIN, and the Final Boss wasn't as good as New Super Mario Brothers Wii's (I'd put this games final boss right below World's). But overall, this has been my favorite launch game EVER!
As for the other games, I'll talk more about them later, I've played the other 3 for about an hour each, and while my views on these games are positive atm, I still want more time with them to give my full view on them!
I've also been playing around with Miiverse (I have around 47 posts there now), and I'll be honest, I actually really enjoy it so far. This is mostly because the Wii U seems to have attracted A LOT of artists, so every day I usually find some cool new picture to give a yeah to (a yeah is basically a thumbs up). Also shockingly, I've only seen one penis and a few swear words, the Nintendo mods are REALLY fucking fast!
Edit: OH I forgot to mention one thing: How the controller feels. Honestly I'm sorta shocked here, this thing is actually almost as comfortable as the 360 controller o_O.
If anyone in this thread wants to add me to their Wii U friend list, go right ahead, my Nintendo Network ID is Theorymon