I don't like that Google killing some great technologies, like Reader or push-email for iPhone (especially last one). I was Gmail user for a long time, but switch on iCloud recently, because i'm looking something fresh and easy-to-use and still want to have push in my iPhone.
iCloud mail interface not just "pretty", but simpler and especially settings. So, after iCloud Gmail looks very cheap, if you don't use iCloud, you should to try.
I'm alone hate new design? Why? Too much dark colors (especially menu) and frustrated navigation, probably because I have habits about old design, now everything looks too much different.
Than next image button (when you'r not zoomed in) looks like it's ajax, but it's not.
I loved Flickr for easy to use light design, I don't care about 1TB, too much because I don't want to share so much on the Internet. So new Flick is lost me as a customer.