Animal Crossing doesn't really get worse imo. It always expands the concept of the game fairly well(or at least, adds more variety).

However, I loved the fishing in the original. Every time you entered a new area the fish respawned, and when it rained it increased the spawn rates of rare fish. You could literally go up and down the coast on a rainy morning and and just fish... and fish. You'd get Red snappers and barred knifejaws mostly. Lots of money. Also, more importantly you casted out far and the bobber came back to you instead of going outwards. It was infinitely more easier to line up a fish because you could cast past it and just wait for the bobber to move in front of fish.

However, it was so good you might consider it a bit OP. I could pull in like 500,000 in just an hour or two on a rainy morning.