The "vanilla" Dark Souls 2 basically just with the regular patches, no DLCs or revamped edition like the one that just came out. I played Dark Souls 1 for a bit a few years ago, I'd say the first third of the game, but then lost interest, not exactly sure why. Never played Demon Souls though and I haven't gotten Bloodborne yet either, I'm just such a shield & turtle guy, I'm afraid that I'll fail miserably once the take away my shields
Edit: Okay I just now realized that this question was directed to Phil
It was a great game and I know that many people think that it's the weakest installment of the series, so I'd definitely suggest checking one of the Souls games out.
I've thought about giving Warframe another try for a few months now, played it all the way when it was still in beta and thought that it was pretty meh, but a lot seems to have changed since then and I was pretty surprised to hear that it has become such a huge success.