On the other hand it can also some kind of proof of honesty and transparency. "Hey, I did that work alone, which is slightly odd, but hey at least I'm not hidi

On the other hand it can also some kind of proof of honesty and transparency. "Hey, I did that work alone, which is slightly odd, but hey at least I'm not hiding this fact." I agree with haddr above. People should not be ashamed of using "I" instead of "we" when it's relevant.