do you code for fun? as long as you do, it doesn't matter whether you do it at work or at home. if you can experiment with new technologies and learn new things at work, your skills are going to improve and it's probably healthier to spend your free time doing something other than coding.
if your work is drudgery where you are maintaining old stuff and it isn't helping you keep your skill set current, then you should be programming in your free time as well.
if your work is drudgery where you are maintaining old stuff and it isn't helping you keep your skill set current, then you should be programming in your free time as well.