In my experience, you only use one Eth address as long as the coin or token is using Ethereum as the platform. There are tokens which you need to do some act using the custom token button...you can find it within the wallet interface easily. You need to know the source of the token or the address of the sender and the decimal number...just click the token history for that its all in there...just read carefully and you can get the answer you need.
I also use only one Eth address. there are indeed some tokens you need to do by using a custom token button. no need you have a lot of Eth.