MikeMy digital SLR can use both CF memory cards and SD memory cards. Which do you prefer, and why?
I prefer CF cards to SD cards. SD cards are a little too thin and seemingly prone to snapping, a little too small and fiddly to easily handle, a little too hard to find in a pocket or camera pack, and the SD cards' exposed contacts concern me. Also, since both CF and SD use the same type of internal memory, it stands to reason that, since CF cards are larger, they will always be able to fit more memory hardware than SD cards, and will always have higher maximum capacities.
After saying all of this, I should add that the choice is relatively unimportant, and the difference would be unlikely to matter often nor much.