Playstation has always been worth it for me (since PS1) with its variety of 1st & 3rd party exclusives, and 3rd party multiplats.
Currently I find XB and Wii U less appealing due to the lack of 1st & 3rd party exclusives that have interested me.
I have a 360 and the only games i have for it are the Halo games, and my Wii U has a handful of their 1st party exclusives. But I think now they aren't enough for me to purchase their next system if they follow the same path as their previous console.
..but to all one's own :)