I’m not really that picky about blogs. There are a few things that bother me though:
(1) When people who hosts weekly link-ups request that you post the button AND link back to the hosts’ pages. I think the button is enough!
(2) When people want you to “follow” them for a blog swap or weekly link-up. You shouldn’t make following your blog a demand. I’ll follow it if it’s interesting.
(3) Ad space for sale. I just ignore that crap.
(4) Captchas are annoying.
(5) When the button for a weekly link-up or blog swap doesn’t work!! (I can’t copy the code and paste it into my blog post.)