Hypersmurf
Moderatarrrrh...
Jack Simth said:As written, Dispell Magic does not require you to auto-succeed against your own spells...
Well, that's half true

If you're using an area dispel, you're correct. You may choose to automatically succeed on dispel checks against any spell that you have cast.
If you're using a targeted dispel: You automatically succeed on your dispel check against any spell that you cast yourself.
No choice is mentioned in the targeted instance.
-Hyp.