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It only depends on what kind of blog you are having.
Doing so is possible when the topic (personal detail) relates to something common, and would serve the story.
Just things aren't bad to say
no rarely
In plain words; no. Blog is your platform for sharing your expertise and not personal information (until it is professional info). If you have lifestyle blog then it can be considered but to an limited extent.
Occasionally, I inject a bit of myself in my blogs, whenever appropriate - if only to drive a more personal appeal.
