What frustrates me a bit is the variety of batteries that serve the same function. Granted, each type may be slightly advantageous for it's particular use but those benefits are outweighed by needing to keep a variety of batteries around. So give me 1 lithium coin size, 1 button battery size (maybe a 2nd for watches). Does the world really need a CR2 and a CR123?
I'll go back to spitting into the wind now.