I don't usually wear sunglasses at the table, but I kind of enjoy it as an option for people to have. It's just a different aspect of the game. True, poker wouldn't be on tv if EVERYONE wore hoodies and sunglasses. But not everyone does. I feel pretty confident in saying that most people don't.
i mostly play just for fun though. So, the all-or-nothing argument over sunglasses is a little dramatic for my level of committment to poker. If my rent check was on the line, I might not want to be the only one not wearing sunglasses.
For that reason, I completely understand and respect Daniel Negreanu's quote that JusSumGuy posted up top. Everyone should scroll back up and read that quote. Almost every top pro does NOT wear sunglasses.