The Wii fo sho. The first console that I bought since the SNES. Brought back old school platforming and for the first time sold me on the idea of 3D platforming. I could never really get into games like Mario 64 but now that Galaxy introduced me to 3D platforming, I want to get it on my brand spiffing new Virtual Console. Oh yeah, did I mention the Virtual console? The greatest collection, of the greatest games, made by the greatest companies on one System. The Wii. Next up for me to buy, A link to the Past, Ocarina of Time, Chrono Trigger, FFVI, DKC 2 & 3, Super Mario World, Super Mario Bros. 3 and many other games that I either miss, or missed.
Also, motion controls are pretty fun, Zelda SS was amazing. The Wii also had the best JRPGs of this gen-not counting Ni No Kuni :'(-with Xenoblade and the Last Story. It might not have had to biggest number of JRPGs but it had the best.
Honestly, I love Nintendo exclusives but they lost me when they went purely 3D and in the weird experimental faze of the GCN. However, now that I have all the 2D goodness that I want (Epic Yarn, NSMBWii, DKCR ect...) I was more than willing to experiment with those new fangled 3D games and whatnot. I also have a backlog of GCN games I want to try out like Pikmin, Wind Waker, F-zero, and maybe Baten Kaitos.
Oh yeah. Metroid Prime Trilogy FOR......THE.......WIIIIIIIIIN
Edit: And for those of you who thinks Nintendo lost its way with the Wii and sold out......they didn't, they finally found their way back on the right track and the Wii U looks like it's going to continue that trend.