Hard to define 'tuff' for someone else. What's cool to one may not be to another. I would think the majority of people would think of something other than cool to describe talking about fish online.
I was given a similar assignment when I was Kas's age. Mine was to describe 10 things I enjoyed doing. I was given detention when I could not name one. I was a little bored with my life at that given moment.
That wasn't my first or last run in with school authorities. When I was Pumaward's age, before Puma or Paintball existed, I was in trouble over a club called the Assassin's Guild where students stalked each other on campus with dart guns. The University wanted the Guild gone and I was the president of the Guild. At the time I thought the Guild was pretty "tuff".
"Tuff" will vary from person to person, and will even change for the same person over time. Kas my point is if you have things that you consider "tuff", that's all that really matters and other people's opinions shouldn't diminish them for you.