It is hard to find someone who likes one Shrek movie that does not like all three Shrek movies.   Some who has not bought any of the shrek movies on dvd will be happy to know that there is a boxed set of all three Shrek movies.   Shrek , Shrek 2, and Shrek The Third can now be bought as one set. 

You can see the full story of Shrek, Fiona, and Donkey and how it began and how they all formed their own familes.