I pop into the ACP once in a while to check if there's any updates to the soft itself, or the extensions, but far from daily. Maybe once or twice a week depending on if I have something I want to alter or just figured it's time to check again.
To add on to this, I do more editing of the core files than in the acp, which most consider editing core files dangerous, but I don't since I consider myself a professional.
I usually check the logs every couple of days, but only briefly. We've recently moved the updates to an approximately weekly cycle, so I usually put the board offline and make a few changes at an odd hour every week. On a daily basis (or almost daily basis), I will also log in to do various things like changing usernames, or sometimes using the ACP as a slightly fancier MCP. 😛