Is it bad that I secretly want to be blind?
Why would you want to be blind?
Because I would still be able to see everything in my imagination, and it would just be fun to experience being blind.
You should not wish that on yourself. You may like the idea now, but if it were to actually happen I think that you would be devastated.
Ok how about if I wish to be deaf instead?
Just like wishing to be blind, wanting to be deaf is also something you shouldn't do. You have to remember that deaf and blind people don't get to choose to turn it off and on. You would be stuck with it forever with no way to fix it.