Dude! I know you asked for constructive criticism, but right now all I can provide is squee. That first one with Dean and John at Sam's graduation was just so sweet with the lovely little details like their fake ids with their real names and Sam saying hi before starting his speech. The second one had perfect Dean voice, although, in retrospect, some of their exchanges must have taken Dean awhile to spell out on the Ouija board. The third one, well, that was my favorite. It had perfect family banter and the fact they wanted to keep hunting together after they turned their dad was just so heartwarming in a deeply creepy sort of way. Excellent job considering it's your first time out.