Worst quality? I am a workaholic, I push myself too hard...or...it takes me a long time to learn anything, I'm kind of a goof off, and stuff starts disappearing from the work place...
When I was first starting out I knew nothing, but a company took a chance on me. Not because they thought I was a good engineer, but because they thought I was a good fit for the culture/work environment, and I was eager to learn. Things certainly are different as you have a career but as others have said, when you are starting out, attitude is probably more important than skill. Having any level of certification (in anything) shows a great deal about yourself too. If you are willing to put yourself out there to try to accomplish something optional, then I assume you are interested in it. I don't have a certification in basket weaving, but if I did you would probably think I like basket weaving.