I've just started making ATCs, and wow! they really are addicting! Something about holding a handful of good solid cards feels really great.
So without further ado, my first attempts at some ATCs! I tried to experiment with lots of different "looks". Sorry for poorly taken photos.
'Hearts' (duct tape and sharpie, rubbed off slightly to look worn)

'Beach' (colored pencil and ink)

'Math Notes'

'Stop the Suffering' (just because...)

'Secrets Secrets' (made with scratch paper)

'Cozy Chamomile' (made with a tea bag tag)

'Scrabble' (I just had to

)

Thanks for looking!