PS3 > PS4 > WiiU > 3DS > PC > PSVita
PS3 - I still have a backlog of games that I want to play with more being added to it because of PS Plus, There's also some games coming for it that I want to play like FFX/X-2 HD, Kingdom Hearts 2.5 and Persona 5
PS4 - This is my main console for upcoming multi-platform games that are available on it and it will replace PS3 as my main console once games start releasing on it more frequently.
WiiU - I mainly only buy Nintendo games on the WiiU, But there's quite a few games that I'm interested in that will probably get a substantial amount of playtime from games like X, Mario Kart 8 and Smash Bros. in the future.
3DS - I'm more of a home console gamer, but I do play quite a few 3DS exclusives that release.
PC - If I play PC games it's mostly MMO's
PSVita - I usually only use my PSVita if it has a good exclusive game like Tearaway or if it has a good selection of PS Plus games for that month which varies really.
I only have one more game that I am going to play on XB360 which is Saints Row IV because I borrowed that version from someone, The last game I will buy for the system was Fable Anniversary which I have finished.
I play Wii games on WiiU, DS games on 3DS and I don't use my PSP anymore.