Well, I actually turned it down right from the beginning due to one major problem, If I ran a self extracting executable, lets say of 2gb volume, it would not start and neither would the UAC dialog box come up, because it would first extract the whole file in the background, to C drive, and after that it showed the UAC dialog, was highly annoying, but also programs like riva tuner and other utilities wouldnt run at startup, and you had to click yes yes yes all the time
As for an application wanting admin rights, I have spybot installed, its a great application, notifies you everytime an application actually is trying to make a change in the file system or registry and blocks it unless you agree, its dialog boxes come up less frequently than the UAC....I think after so many years, I know what im doing when im running an executable, I dont want to wait and delay it...just how i feel..