That's a useful summary of what makes a good drabble.

As for your questions at the end, personally I have a lot of ideas that are simply drabble length ideas! My bunnies are often baby ones *g*, and I find it a satisfying form to write in. In some ways it promotes laziness I suppose - it's certainly not helping me to write the long drama I have had in outline for a couple of months, but I think they are also good discipline. They make you look at what is necessary and what is extraneous.