Rigorous Training Try the same challenges, but informally. Play around with a camera to see what it does. Check out different styles of writing or poetry to see how they fit you. Try a different medium every week. Make an informed decision about the way you want to present your work.
ALL media have strengths and weaknesses.
The Portfolio is documenting a Learning Process, and there are lots of levels of any process that may need to be documented. Getting attached to one particular mode might mean frustration when someone asks you to balance it with another later on.