Yeah, I'd agree with David! Although after a while I got around to learning theory, I mostly jam in the keys of D or G, and know which chords I can go for in those keys.

However, I recently picked up a CD of the Jam, and Paul Weller, who writes most of their material, doesn'r seem to listen to any of the 'theory' behind music. He has some really crazy chord sequences!

But yeah, I've begun to write songs now, and I try to avoid the normal patterns of G C and D, cos you just end up with unoriginal melodies.

JE