I hate "Guest Blogger" posts.
If I go to a website to read a blog it's because I like THAT person and THAT person's writing style and what THAT person has to say. It pisses me off when I get to a favorite site, see a new post, get all excited and then see "Oh btw I let my total bff do a post today because I'm too busy so here you go! Isn't my friend the best!??"
No, no your friend is not the best and I'll probably hate them even if they really are great just because I'm disappointed and childish and pissed off that I don't get to read the person that I was looking forward to reading.
If you're too busy to post just don't post. If you really want me to know about your bff and how great they are just put them in your link list because if I think you're the shit then I'll most likely check out your link list in search of other goldmines.
Have you ever noticed though that some of THE coolest people you like to read have some of the shittiest blog links? (Have I pissed off everyone yet? I'm really on a roll here, shit.) Out of 20 blog links I might find one - MAYBE - that I'll think is actually cool, but truth be told I don't usually become a repeat reader. Why IS that? I don't get it.