Thanks guys! I've also got a regular PFD on when I'm on the water. (Might upgrade to a fishing version with pockets. Nice set-up Canoedogs!) I prefer the always ready nature of a traditional vest.
I was thinking that the self inflatables might be good for my fishing group, who are prone to bringing them but not using them. We stick close to shore and fish in very calm and quiet area so they think they're safe. My accident last year was on big water and involved tubing not fishing but they all saw how nearly impossible it was for me to swim or get back in the boat.