I can’t stomach blogs that bitch about personal diary-like stuff. Especially ones along the line of, “OMG, I’m so mad about something and a certain someone totally pissed me off. K, bye.” type.
If you don’t have a topical and content oriented blog, I think it’s fine to have a personal site that serves as a “What I’m doing now” kind of thing, but if it’s going to be a “today I woke up and watched TV and felt like crying all day” online diary, keep it private. It’s incredibly narcissistic and pretty much nails you as a douchebag.
I also hate bad repost blogs. I understand that a lot of the internet is made up of reposting or quoting content and slapping a link back and used sparingly, it’s okay, but sites where that’s it is…again, pathetic. It’s fine to be a site of filtered content…look at boinboing, but there needs to be some commentary, something that adds to the information.