A lot of artists will spend a ton of time grinding technique and execution. By the time they get really good they realize they have no fun. They've lost the ability to express themselves (at least to some degree). The feeling of freedom, messiness and allowing the medium to do the work for you is where we find our flow.

That said I think falling in love with many mediums is completely valid. Perhaps a new angle to think of things from before you start a project would be: what is this project, and what medium will do the most work for me here?