I have to agree with johname - the reason "dazzle" works is because it's a verb. It's also a frequently used phrase (by businesses, etc.) when combined with the word "me," where as "careless" is an adjective (or maybe an adverb in certain cases, I'm too lazy to look it up).
I find that verbs make the most sense in .me. If you have the patience to manually look for words, there are still plenty of half-decent names available. I came up with a list of a couple dozen decent .MEs that made sense, most of which were verbs. This is reg fee, I'm afraid.