[Margaret Pilkington]

Jen, that is all that really matters......that it works for you.
It is all about preference.
I have had both types of batteries in cameras...my preference would be for a camera specific rechargeable...but I make sure I have a spare....but AA's are freely available...just choose a retailer that sells lots of them and make sure they are fresh...and remember to take them out of the camera if it is not going to be used in a while.
Incidentally, those batteries which are no longer strong enough to power the camera will often be fine in a clock or something else which needs relatively low power