I understand that some people use multiple wallets of different kinds, so this poll asks which wallet is most used, this can be measured either by quantity of bitcoin or ammount of transactions.
I think this kind of thread has come up before, anyway you could have simplified it and kept it easier by listing names of the wallets. For the best one is Coinbase.com it's simple, easy and efficient to use. It's has good Security measures. Then there's Xapo but I never have used it but people love it. And of course the common wallets blockchain, there's not much to say about it. Then the thing one is supposed to take care is which wallet gives you the keys and this is important if you are holding a huge amount, hope it helps you.