So, in the spirit of being helpful, here is a bit of advice, given from my humble perspective. I know you didn't ask, but bear with me.
I was just surfing through a bunch of new blogs that someone recommended, and I realized something. One of the first things that I look for when visiting a blog is a photo of the blogger. Not because it matters what a blogger LOOKS like -- but because it makes our visit much more personal. If your photo is on your blog, I feel like I'm making a connection with a new friend -- like visiting over a cup of coffee or tea. If there's no photo... well, the visit isn't quite the same.
Also, I am much more likely (I've noticed) to leave a comment on a blog when I've "met" the blogger via a photo and an "about" paragraph or page -- as opposed to a generic bio with limited information and no photo. I guess I just like to see who I'm "talking" to.
C'mon. Don't be shy.
Lots of the big bloggers have really professional-looking pictures. Mine is just cropped from a family vacation photo. Some bloggers use "selfies."
A profile picture. It's a good thing (as you-know-who would say).
By the way... I'll be by for tea tomorrow, okay? *wink
p.s. Also my opinion, but if you have a FB "page" or any kind of social media account for your blog... your picture should be there too! It's a great way to connect with your readers, and using the same photo from account to account provides continuity!