Personally, The Sands Of Times, is my favorite one. Interesting story, amazing graphics, the sands that affected your gameplay, many different enemies. The controls are easy to understand and you will love the usage of the sands of time to defeat your enemies.
I recommended it for the fans of the Prince Of Persia and for the newcomers in the series.
Thanks to Ubisoft for creating this game and another thanks for GOG.com for posting this wonderful game and of course DRM-free.