Which wallet do you use for storing your ERC-20 token?
I personally like MEW because it's very easy to use. Some people like Trezor or Ledger but personally I have no problems by using MEW

In MEW you have complete access to your private keys.
I use mostly Ethereum for making transactions and making investments. So my favorite wallets are MyEtherwallet and Coinomi. I am quite content by both of them and I don't see any reasons to change my choice on behalf of some other services.