I guess I'm the wierd one. I have a Macbook (5,2) and I3 iMac that I upgraded from SL to Lion, but have not upgraded to Mountain Lion. I keep a clone of SL for the iMac when I need PPC programs. I like iChat and FaceTime on Lion, but don't really care if I have iCloud. I have a new Macbook Air on ML, and Facetime was difficult getting to work with everything (the machines already mentioned and an iPad 2nd generation), and I haven't easily been able to get Messages working for video calls between various video programs. For me, Lion is working fine, great, no problem on the machines I have it installed on, and I will likely never upgrade these machines. I also don't like the App Store update on ML. The Macbook is mostly my daughters, the iPad mostly my sons, the iMac the hub. I don't want further integration with iCloud. I want to manually control what machine has what in the way of pictures, music, programs, etc. I don't want to be any more dependent on the Apple Borg.