I'm a veteran of the Resident evil series, and about the game that introduces people to the franchise being their favorites, this isn't the case with me, the game that introduced me to the series was Resident evil 2, and while it was freaking amazing, my favorite has to be Resident Evil 4, despite the massive changes to the gameplay and overhaul of the series mechanics, it was a fresh change of pace, and with Resident Evil 7 coming next year, the series will revisit its old FPS gameplay from the Gun Survivor series but with a new fresh spin to it hopefully. I want the series to continue to change but remain resident evil, which sadly Resident Evil 6 didn't seem to do very well. The beginning to the Leon story was the only thing that Resident Evil 6 did right in my eyes.
As for other games, like pokemon, I also like the introduction of new pokemon. The new Gameplay mechanics can go either way in my opinion but my opinion can't change how others feel about the games and the core mechanics. Mega Evolution was hype, but I don't know how I feel about Z moves. This must be the work of an enemy stand. I'll reserve my opinion on them when until the games land