Wait, there's a difference between types of file?
I guess I use MP3, since that's the only one I know of!
Actually I think I know what WMA is...
I use ITunes, what's that. Doesn't it have a four in it?
(Yeah, I'm an idiot.)
Anything besides m4a, m4v, mp3, and wav is EVIL! That's all you, the iTunes aficionado, need to know!
I use mp3 because of its versatility. Besides, who needs 60 MB freaking large files? I can't even tell the difference most of the time.
I can and thus it makes it worth it to me.
Why are other files so bad??