Are you usually honest with yourself?
There was a time when I wasn't. The worst part of it was that I didn't realize I wasn't being honest with myself. Or, maybe, I didn't have the capacity to be aware of what I was (or that I was) denying and rationalizing, or the capacity to deal with why I was doing it.
It is easy for you to do so? If yes why, if no, why not?
It is VERY easy for me to deny things within myself/to myself. I realized it a while ago and now I put a lot of effort in remaining vigilant about my thought processes. Why? I think there are several reasons for it, including what I mentioned above. I grew up in a space where I learned I couldn't be honest if I wanted to preserve other needs, which I guess were stronger. I also couldn't give voice to my reality and sometimes didn't have the skills for expressing myself without assistance - I needed to engage with others (which, at the time, gave truth to my reality) a lot more than was possible. But also, other people's realities seemed to scream so loudly that mine eventually faded away.
Do you think it's important to be honest with yourself?
Like NAI said, being honest with ourselves really might be one of the most important things we can ever do. Speaking for myself, I don't see how I can become self-actualized and achieve what I desire in life without being honest with myself. I do think it takes a lot of strength to admit what is and be willing to face it. I also don't think honesty (both with oneself and others) is an all or nothing affair. It's a lifetime commitment and, at least for myself, a case of constantly climbing the mountain.
Is honesty with self always a good thing?
Sometimes we may not be honest with ourselves because the truth might be more than we can handle. We might suppress or repress things (and thus, deny them) as a means of coping and in attempt to continue to function. So in that sense, I do think denial has its place and purpose. Unfortunately, things have to eventually be dealt with and a habit of being dishonest with ourselves can make this process (and life in general) significantly more difficult.