1 All 3 of the Fairy Tail OVAs should be good source material.  Which is hilarious when you realize they're actually based off the mangaka's omakes.  He actually storyboarded the 3rd one himself.

It also goes with a trend in his own work.  He took his work on Rave Master and added bigger breasts, which is how we got Fairy Tail.  It's noticeably more popular.

2

The third one was actually a pretty neat story. As we all know, it's hard to do a good job of a time travel story, and absolutely wrap up all the loose ends, but this was pretty decent.

It was kind of too bad that Grey didn't have any interaction with his younger self. On the other hand, it was neat that each of the other three had a different kind of interaction.

Erza spoke to her younger self and nudged the kid towards being less irritable. Lucy saved her younger self, and talked to her, but not face to face, and didn't realize who it was. And Natsu...

3 And having Lucy as a bunny-girl and Erza as a catgirl certainly didn't hurt the third one (heh).