A person who is incapable of being satisfied is considered insatiable.  

I'm not sure whether it is a negative or positive (or possibly both) characteristic, but, oft times, it applies to me.

I admit to many insatiable hungers.   

For example, I can't get enough of Aaron Judge, the Yankee baseball superstar.  I watch his every at bat, know all his statistics and go to bed a happy boy if he homered that day!

I also have an insatiable appetite for Social Media and, according to my wife, spend far too long trolling on my phone.  

I have many more, but space allows for only one more: I have an insatiable appetite for salty chips and used to consume them with a nightly Cuba Libre.  

Maybe there's hope for a more level life though, as I am (currently) no longer drinking...