Have a PS3 since launch in Europe in 2007. Still the same fat PS3.
Every generation I go, excluding PC, 'Nintendo + x', 'x' being the other console that hands me the best value. Really the only reason I have to have a Nintendo console every gen is because it'll have a Zelda game. The rest is, well, sort of expendable. That console of value has been a PlayStation twice now, a PS1 and PS3. Likely the 8th Gen will also see a PlayStation as my 'console-x', because it'll give me the best value in exclusive games.
I hardly buy third party games simply because to me they are hardly ever good enough. Really, the last time third parties came close to the quality of first parties, was in the fifth gen (the last time they actually competed was a gen before that). Why buy them when I can spend my money on way better games? This doesn't only apply to Nintendo consoles; I hardly buy third parties for my other consoles either.
On PS3 half is third party, but five of those are Guitar Hero so that artificially bumps the number. On Wii about a third of my collection is third party. On WiiU I right now only have two; ZombiU (because it was bundled, otherwise I wouldn't have) and Child of Light. In the foreseeable future I'm only seeing Watch_Dogs as an addition, and I wouldn't be surprised if those three Ubisoft games remain the only three third party games I'll have on my WiiU at the end of the generation, but there'll probably be a fourth at least. On 3DS I only have one; Resident Evil: Revelations.







