Thanks again for the response. I pretty much feel the same way about all the games you mentioned, but I feel that if someone intends to put in dark themes into their game it should be in a story branch that isn't necessary to follow. That way the user doesn't need to skip it.
As for your own content, I imagine if you rushed any part it would reflect poorly on the reviews, but at least you're learning a lot about it all and can figure out where to go next from that. Keep your spirits up, I'm sure you'll find your niche sooner than later and the money and fans will come along in no time :)
I had no idea Steam had a monthly fee for developers. I suppose it makes sense, but I always thought they just took a small cut off every purchase. Good to know.
Best of luck to you, in whatever you choose to pursue!