Ha, well, one of the accounts is my boy Helmer's, and at the moment I only really play on the account I started up most recently (Incredible Mechanical Fisher). I don't have any gold badges for any hero on any of my accounts, so I just get my heroes to level 20 and then relax!
There are still loads of characters I've not played on any account, so my aim before the shut down will be to try them out. Monkey King, here I come! Squirrel Girl, watch out!