I'd have to say Infamous Second Son.
It was the real stand out game during the PS4 announcement for me. Helped that I really enjoyed the previous Infamous games too. Then when it finally came out it looked and played fantastic. Bit short, yeah, but still well worth the wait.
it really was a fantastic game, if only it had better side quests with fleshed out characters, it would have bee a really stand out game. i wasnt even a fan of the first two infamous titles at all, but second son was outstanding. cant wait till E3 hopefully sucker punch will announce a new one.
@OP: this gen, id have to say maybe Destiny, it didnt turn out to be the game i wanted it to be, but it was pretty fun regardless. after that id have to say Farcry 4, was really stoked for that game, and it was fantastic.
currenlty my most hyped game is Uncharted 4, because its just one month away from release, but my most hype and excitment is for Horizon.