That's definitely how I look at my blog. I would also probably say that I think of myself as a diarist, especially these days. I've tried to branch out and embrace other types of writing to the same extent I've always embraced journaling and diary keeping over the years, but it never seems to hold my interest for long.
This has even been the case with my other blogs on Blogger. They started as attempts to build resources for other people's consumption or write more generally about topics I care about -- like food, or astrology, or spirituality, or freelancing. However, they ultimately wound up settling into alternate diaries -- places I can go to record my thoughts and experiences as they relate to those topics. I do occasionally write or include resource articles as well if I decide I'm in the mood, but those are few and far between.
Narcissistic as it might sound, I fascinate myself, so I'm my own favorite topic. I love using writing to explore my thoughts and feelings about different things. I love recording things that happen in my life. I love exploring my past and my relationships to other people, as well as to the rest of the world, through my writing. I enjoy the act of at least potentially sharing what I write with other people, but I write mostly for myself.