How much appreciation and support (if any) do fangame creators deserve, and are they currently getting enough?
In general I feel the same way as the other guys in the thread so far, no one is entitled to any appreciation and support. As someone who's been involved in making a few fangames, I don't feel like I deserve any kind of special recognition for doing so, I just had fun doing it! If you're making a fangame (or really, anything) because you want public adoration, 99 out of 100 times you're setting yourself up for disappointment.
Is it okay to heavily criticize people’s fangames that they made on their own time for everyone to enjoy?
How much patience and forgiveness (if any) should fangame streamers and players be expected to have?
I believe it's ok for anyone to do whatever they want. You want to make a "happil medley" style fangame because that's what you enjoy? That's your right, you should be able to. Are you playing a "happil medley" style game and hate it? I don't expect you to bottle your feelings and force yourself to pretend you enjoy it. And you can insert whatever genre you want into those quotes, because for every style of game that someone hates, there actually is someone out there who liked it. Sometimes games are heavily railed on-stream, and the opinions of the chat are often just a mirror of the streamer, and so it kinda blows out of control. Sometimes I wish that streamers would be willing to give a game more of a chance, but I certainly don't expect anyone to. Everyone is entitled to their opinion. I've experienced my fair share of being criticized, but I don't hold a grudge against people for that. Either they had my best interests at heart, and have helped me grow, and so I'm very appreciative; or they just wanted to shit on me and therefore their opinion didn't matter to begin with
What is the right balance of encouraging quality fangames while not scaring off potentially good creators?
This goes back to my statement above - do what you want to do. If you want to throw together some screens in jtool and release it a couple of days later, go for it. If you want to sit down and plan a storyboard for your game on paper for months before you even open gamemaker, sure! The wiki isn't a zero-sum game; just because someone releases a short needle game it doesn't mean that the slot that an adventure game could have gone in is full now. As far as I'm concerned, all fangames of all types are welcome.
To what extent can you be proud of a fangame that heavily uses other people’s content? (spook jam, medleys, and in general using music+sprites+sounds made by others)
As I've participated in medley projects before I don't think I can give a non-biased opinion here, so I'll leave that one to others.
Is it okay to use the self-made assets of other people’s fangames?
Someone has used one of my self-made assets before, and I'm always releasing code and tutorials to the community, so I feel like I can speak on this point. In my opinion, we grow stronger as a community by pooling together resources and combining them in different ways. When I see things I've made being used by other people, I feel far more proud in those moments than when I see people playing my games. We are constantly borrowing resources from other projects, both commercial and non-commercial, and in my opinion it's a form of praise to want to use something someone else has made.
That being said, if you are taking something someone else has made and trying to play it off as something
you made, then you're kinda a scumbag
Credit where credit is due.
To what extent (if any) are quality fangames not getting attention they deserve?
I don't think any game deserves attention, it's not an intrinsic property. A game gets attention because the people giving it attention wanted to. If there were people that wanted to give the unrecognized games attention, then they would be getting it. Of course there are games that I wish were more popular, but I'm not about to start streaming and make them popular, so I have to accept things for how they are!
To what extent (if any) are fangame creators limiting their creative growth as opposed to making freeware games for a bigger, more general audience?
Well, I guess it really depends on what you personally as a person want to get out of this. I make fangames as a side hobby, as I already have a secure job in a programming field. However, I was able to leverage some of my experience as talking points in interviews recently, and it always makes for good conversation, so that's been neat. If you are aiming for a strong resume then it's probably good to make some fangames and then move along, because GameMaker experience is not going to land you a job.
That being said, I think that the fangame community is great because I've never seen another place where so many game makers and players have come together with such transparency. Games come out daily, there's always a stream online, commentary flows constantly. The growth potential for an aspiring developer here is incredibly high, higher than anywhere else I could think of, so in my opinion, being active in this community is in no way a waste of time. There's plenty to be learned about being a creator than just the toolset you use.