No you should be lucky those are the only "bad" social habits you have. If you think trailing off or mumbling is bad, try stuttering on every single word or laughing way too loud like someone who's actually socially awkward.
Someone who means a lot to me hurt my feelings real bad when I told her how I was feeling. "How can you be depressed if you're so happy all the time?" And I just shook my head and said, "you're lucky you don't know the answer to that question.