Fun Stuff:
-Teaching an Aeon Lancet. They do good damage!
-Teaching Lulu how to steal. It looks funny, Lulu runs up and nabs stuff from an enemy. I've yet to see her use Mug...
Also, I like to record certain lines onto an audio tape and 'remix' them. Like when Wakka said 'What about the teachings!?', I recorded it and made it say 'What about the t-t-t-t-teachings!?'.
To do that, I have a stereo with a reverse direction button and I pause the tape I'm recording on while switching directions so it plays the part over and over again, making it sound like Wakka's stuttering and stuff.