Back in the day when I first played Mega Man 4, I was a little disappointed with it, too. Just wasn't as good as Mega Man 3 for some reason. But all the NES Mega Man games are still pretty darn good, even if they got pretty same-y.
I loved Axiom Verge. While it was nowhere near as good as Super Metroid, it was still a very fun 16-bit Metroid style platformer.
http://www.gamerdad.com/blog/2016/10/07/axiom-verge-wii-u-ps4-vita-xbox-one-pc/


