A month or two ago I read a post by James about how he had gotten rid of most of the individual characters from his study, and I decided to try it for myself.
It's helped a ton - it's really allowed me to streamline my study and make my time much more efficient, while making Skritter time much more enjoyable as I'm not daily bombarded with those obnoxious characters with 15 definitions, none of which are useful without tacking on at least one more character anyway.
So thanks to James for the great advice, and for those of you considering this step, I'd highly recommend it.
Note that I still keep certain individual characters if they're useful on their own, but anything that I'm not used to seeing alone gets the boot, and it's been a huge relief.