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.
In my point of view online wallet is very secure and one of best option to keep your bitcoin. I always use online wallet because it easy to use and I can access it easily.
Usually I put my signature campaign pay out and some profits from trading to online wallet.
Online wallet that i've use is blockchain and xapo, but there is other online wallet that also have good feature such as coinbase, Circle, Strongcoin and many other.