Pretty much everything about it (except lack of big budget 3rd party games).
I love the controls, I think they work great, the dual analog set up I hated so much it almost caused me to lose interest in gaming, I find this set up much more intuitive.
The 1st party titles have been stellar for the most part. Mario especially has been fantastic on the Wii.
I lke the download service, Virtual console is great for downloading old classics I regret selling, or games that I never played to start with ( I never owned the SNES so this was a great way for me to get to play some of the classics that I missed on that system). There are also a handul of unique WiiWare games that are amongst my favorite games on the system.
My favorite part of the Wii is how it has convinced many of my friends and family members who previously had no interest in gaming to give video games a shot and now they enjoy plaing games with me, and many have decided to buy the system for themselves.
