Hey all, this is probably really old and I'll most likely get ridiculed for posting it, but I thought it was delightfully hilarious, so here goes nothin'. A friend of mine texted me this image earlier today, in which a series of letters from Damian Wayne to Dick Grayson are depicted, all hilarious and totally in character (though not canon). He even finds time to spare a word or two for Tim Drake and Batgirl. Hope you all get as much of a kick out of it as I did. The image itself is quite large, so I'm linking to an Imgur account (get there by clicking here) for convenience's sake. Here's just a sampling of what's contained within:
EDIT: Make sure you open the Imgur link in a new tab, otherwise the image will be completely illegible.