 If you liked
Azumanga Daioh
|
 ...then you might like
Wa!
|
They are both in a school setting and "slice of life", if you like "Wa!" chances are high that you will like "Azumanga Daioh" as well. They both have the same kind of humor and Azumanga is as easy to go through as Wa is.
I feel that its one of those manga where you can take everything for face value; its not very heavy plot-wise and its simplistic nature is very relaxing and enjoyable.
Hope this helps!