I think it would be great if you could add your own comments to effects and instruments in the Browser. Some plugin manufacturers give their plugins really stupid names that don't tell you what they are, so sometimes when I want a plugin, I know it is from a particular manufacturer but can't tell which one by the names. Rather than having to try them all, or look them up online, it would be nice if I could just add some comments to tell me that this one is a good bus compressor, that one's weird distortion and so on.
I'm sure there are all sorts of other ways you could use these comments too.