What game series did you use to enjoy but they changed the gameplay to something you hate?

Was going to go with Mass Effect. So much changed in ME 2 (although I did still enjoy it) that I didn't bother with ME3, because it sounded less like an RPG than ME 2 was.

CoD MW changed the series for the worse in my opinion.

Paper Mario after TTYD

RE7 - good game, bad Resident Evil.

Metal Gear Solid 5 - just didn't like the game at all

Final Fantasy - I prefer turn based over what they are doing recently.

These are the ones I can think of off the top.

Front Mission. A fantastic tactical mech RPG that they just took outside and put a bullet in its head.

All so that they could make a really shitty 360 "Western" take on the genre.

It SUCKED.

Final Fantasy. The last one I really enjoyed was X and I absolutely despised XV. I think a lot of this is because my gaming tastes have changed, but I replayed X a few years ago and still found it enjoyable. I'm probably done with FF now and honestly have no plans to see what VII Remastered looks like.