(I'm talking strictly solo here, not multiplayer)
I've finished ZombiU and it was really good - if you're into zombies and games that are challenging then it's worth taking a look. It's atmospheric, genuinely creepy and utilises the gamepad well - when you hear a ping on your radar it makes you anxious. Inventory management on the gamepad should be mandatory for any games with an inventory - it's unbelievably useful and after a while I was so quick at swapping weapons/health etc before zombies could sneak up on me
It's not without it's flaws, sometimes the graphics can be a bit sketchy, it can appear washed out at times, and melee combat is cumbersome but the game is not meant to be a fps - you're a random survivor who finds a weapon and starts defending themselves - you become more proficient at using a weapon the more you use it. When you get killed by a zombie you feel gutted that you've lost your progress with that character as well as all your loot - for some reason I tended to survive longer as a woman.... man was I upset when my police lady got eaten after going on a 100+ zombie kill streak. It was fun to kill and loot the corpses of several gonintendo zombies as I made my way through the game and leaving messages for others is neat too. Overall I'd say it's a very good launch title.
Mario is Mario (that's a positive in my book) - looks gorgeous in HD and the challenge mode is adds another layer to the existing gameplay. I also like the different coloured Yoshis and the miiverse integration. (bear in mind I'm only about a third of the way through it) It's way better than NSMBWii and NSMB2 in my book - some of those star coins are really really hard to find. Nintendo did a good job refining the series with this version.
Then also I have Mass Effect 3 which I'm only just getting into, but as it's been around elsewhere most people know what to expect already. One thing though - as I played both ME 1+2 on the PC quite a while ago, the digital comic at the start was a welcome refresher to remind me of the story in the previous ones. I've not had an issues so far that make me think it's a bad port or anything like that, the frame rate all seems good, same with the audio. The map on the gamepad is handy, and it's nice to be able to move your squad around on it by dragging their icons to where you want them to move.
From the eShop I've downloaded Trine 2 and only played a couple of hours so far as I've been busy with other games but it's also a very good looking game and I'm liking the switching between 3 different characters to solve the problems you encounter. This is one for playing in bed, off tv (same goes for Mario)
The one game I have that's grabbed my attention the least is Nintendo Land. It's enjoyable enough but it doesn't seem to draw me back to it like the other games have. It was part of the deluxe bundle so I'm not sure if I'd have bought it standalone. Maybe I'll enjoy it more when I have some family and friends about to try the multiplayer with but that doesn't happen very often these days.