Every OS has it's annoyances (for OS X, the whole OS is an annoyance to me, Linux + high end Radeon HD cards can be glitchy, etc). I've found Windows 7 to be an OS with relatively few annoyances, especially compared to Windows XP. I will say though, I hate the new taskbar... Vista had it perfect IMO. Also I really miss Active Desktop. JavaScripted animated backgrounds were epic. Sometimes I'd embed an SWF I quickly made in Flash 8.