That's funny becasue I have a ton of allen keys. I don't even know why, but I have every size imaginable. And for Phillips/flat heads, I think we all have a box full of little blue ones. LOL. Good point though that you have to have the right size allen key, but most atties that use them will send the correct size along with the atty. But I still get your point.
I'll buy you a full set of allen keys if you buy me a ticket to Trinidad!