Even now, I sometimes feel vaguely embarrassed to tell people what I’m reading unless it’s a “classic.” Maybe that’s because I unconsciously associate self-help books with something people turn to when they are weak. But wanting to become better or being weak isn’t really a bad thing, is it? I wonder why I feel that way...

I suppose this happens because you care a lot about what others say. You shouldn't. You should focus on what is good for you and what you think you need. Whoever doesn't understand or like what you do, can go the other way. No one has the right to categorize you weak for this. It's your business alone.