This is accidentally posted on the "birds" forum. You'd get better answers on the heart arrhythmia forum.
www.medhelp.org/forums/Heart-Rhythm/show/92?camp=msc
As for your PAF, did they give you atrial measurements? That would give you a better idea of how severe the problem. Like having a murmur, there are several different grades of murmur - some benign, others more serious.
Your BP and pulse are excellent. The PAF must be minimal (although I'm sure it doesn't feel that way to you) if they're managing it with baby aspirin and not coumadin.
I have multiple arrhythmia problems but life is still excellent. For the more specific question of "how bad is it", that's something your cardio should explain clearly to you. Don't be afraid to ask him/her.
(I'm going to bump this on over to the right forum where you'll get more input.)