The gollum strat. lol It would be fun to be able to relax and fish the human way. It could be a lot of fun if they put a bit of work into it. Maybe adding a learning curve. Rewarding practice and skill with better fish.
I personally would never tire of fishing in Skyrim. I love hunting in it as well. Could do it from dawn to dusk. Would be really awesome if there was a merchant who paid a higher price for fish you caught as well.
I would like to see this is as a feature, be nice to sit by a tranquil river doing a bit of fishing. I'd also like to see a purpose given to shovels, such as been able to dig up buried treasure .