Oh boy, so I started using Python first. I took "reflection everywhere" for granted so hard without even knowing it. I learned Clojure next, and while it had its rough points I never thought, "Man this is really hard!"

Then, I learned some Scala & Java. That's when I realized how for granted I took this thing called "reflection". Especially when it came to ORMs. Holy mackerel. I got over it but it is definitely a huge thing -- for better and worse -- that is so easy in Python that really spoils beginners.