Blogoscoped has a list of fifteen annoying things about Google, from interface issues all over as the site has grown like ponzi, to the mere existence of Orkut. Fun — and mostly accurate:
3) I am shown the number of e-mails in my spam folder in Gmail, causing me to obsessively check it since I get more spam than regular mail. Although, I must say Google gets 99% of the spam and has never miscategorized a message. That accuracy is what makes me mad about being pestered about the contents of my spam folder.
4) Google Reader and Gmail have different interfaces, when in fact the data structures that they represent have intrinsically similar properties [that should be invisible to the user] and thus should have a common interface. I’ve been saying this, and Yahoo! recently picked up on it. Kudos to Yahoo! I won’t be switching but I did admire.