After my last post, I noticed a few things. One, the process I am planning to engage in seems to be generally called "Code Golf". Second, a number of the problems I gave before were actually not even the best solutions I had. Third, "Character count" isn't a great measure either, so I will be using the most accurate and universal measure I can think of for now, which is size in memory of the files.
Now that I have decided that I will be doing a code golf challenge with Project Euler subject to the one-problem-per-language constraint, I have gone through and chosen my most efficient solutions, which gave the following results:
The first table is where I was after just choosing short files. The second table is where I now am after starting to minify some of my solutions (the minified solutions are named "eg", for "euler golf"). I will hopefully finish minifying the solutions in this chart soon.