Back in the day, I used to craft quite a few color configurations. I like different color configurations for different lightning conditions, moods, whatever, I just like to change.
This was when IDEA used to support only Java, HTML and XML. Today, creating a new color configuration is nearly unsurmountable -- 14 different syntaxes, with no (easy) way to reuse colors between them. I lost my drive to create new color configurations, it's too much of a hassle.
So, for IDEA 8, I was hoping to see a simplified Colors & Fonts configuration panel. One where I could define colors for language agnostic elements, and have those applied to as many syntaxes as possible. Keywords, operators, parenthesis, brackets, commas, strings, number, escapes, comments (line, block and documentation), classes, imports and many other items aren't specific to Java, and it would be nice defining them only once. Of course, some elements Annotations and Symbols are still language specific (to Java and Ruby, respectively), but I think those are more of an exception than a rule.
Another nice improvement would be an easy way to copy the settings (colors, font type, etc) from another element. For example, if I want block comments to look the same as line comments, I could right click on "block comments" and select something like "Copy settings from ... -> Line Comments". Better yet would be a way to link the two elements, so if I change one, the other would be automatically changed too.
Okay, I'm ranting for too long. Anyone else here cares about making your code look pretty (and colorful) like I do?