I thought the Pixie Hollow badge system was a flitterific idea. Working towards goals ranging from heck easy to extremely difficult and time consuming was a great way to not run out of things to do. This list has what are thing were the easiest to earn badges from the original Pixie Hollow. I didn't include any of the event badges.
Honestly, getting badges was super satisfying. They're fun to make, too! I hope FairyABC brings back these, as well as the hard ones, so that our new fairies can have their own badges to fill up their leaf journals!