That drop/growl felt like going down a high roller coaster! 

I like playing this in the car with other people, because they always have some sort of reaction at that growl.

Thanks for the hooktheory website guys! 

I don't necessarily use the entire stem, but I will take parts of it to use for my interpretation. I break it up in samples for me to use.

Whatever you decide, just remember to listen to your mixes in monitors, headphones even if they're cheap, car speakers, anywhere to make sure it's sounding good.

I really liked the ambient and deep sound to it. There was a change of pace the 2:05 mark that I hard a little trouble digesting because it came at a surprise, though.

This is something I struggle with as well. Last week, and I went and deleted a couple unfinished projects and left those projects with potential. What I have noticed, is that I get used to my own song and get either tired of listening when I hit a roadblock. So recently, I tried working in 30 minute intervals, and then taking a small break of about 5-10 minutes, and then going back at it. If my mind can't go on with the current project, then I switch to another project and continue where I left off. This has helped a little but, I still get the feeling, like you said, that I can't compare my amateur doodles to professional work I hear.