Im using MyetherWallet for receiving altcoins and send altcoins , because usually some ICO not receiving exchanger address.
I recommend using Myetherwallet for receiving and send your altcoins , easy to use , can add new coin (if not listed on exchanger).
Myetherwallet is so safe wallet and I recommend this one to be used by the other people who seeks some convenient wallet for stocking, And we can also used an hardware wallet if we want to hold some big volume of alts. but still Myether wallet is more easier for me since I can use it wherever I want but we should always make sure to became more responsible to our private keys so that we will not became a victim of hacking.