What makes a good blog good?

I’m up again after snatching another hour of sleep or so. Before I go to the office, I thought I’d ask the blogosphere (does anyone still use this term? Does it exist?) what makes a good blog good? This is a question I kind of answered before, when I explained what blogs I usually add to my blogroll. Two main things: A blog by one person, not a group (or a publication of sorts) That person publishes posts regularly (once a week or so at least) These are good, but they are guidelines more th...