Hi, Harry O'Neil,
I've been struggling to know the difference, even though I've done a thorough research about it.
Has your research included the many questions and answers on the issue included in this site?
Why do we say:
I wish it would stop raining
I wish it stopped raining
Both are possible. The only difference is that "would" expresses the speaker's annoyance because it has been raining a lot.
What would the difference be if I said either:
I wish this game would be good
I wish this game were good
To express a wish where you want to change a present state, use the past simple:
- I wish this game was/were good.
You should take into account that "would" expresses willingness, and the game cannot change its nature of its own will. With the weather, though, we can use "would," as if the forces of nature had the power to change the course of events.