I have been using for last 6 years and its really feel me comfortable..Just Because of i am aware of how to use it..Lol....Not like that actually sometimes back windows vista and all ..But i could not understand cause of its advance features..So XP is best..
I am very comfortable using Windows XP Service Pack 2 , till now there is nothing give me more satisfy than Windows Service Pack 2.
I like window Xp SP3 ............. i feel very comfortable while running it and using its different features. The other versions of window may also be good.....