From: My Mother, although my Father had some small part.
IMHO, I'd leave well enough alone. You have plenty of hard drive space left, and reinstalling games and then patches, and then mods, can be a real hassle.
Now if it was one 40GB game on Steam, and some get a lot bigger than that, then I would certainly delete one game to save that much space. But 10-30 games, may not be worth it.
Seek peace but keep your gun handy.
I'm not a complete idiot, some parts are missing!
“Illegitemus non carborundum est (“Don’t let the bastards grind you down”).”
― Julia Child