Everglades National Park: Shark Valley or Florida City entrance?

Which entrance is better (i.e. more to see, more to do)? Thanks!

I would say the Florida City entrance. There are tons of trails to take, but don’t forget your insect repellant. The mosquitos will eat you alive.
If you’re not into trails, then there isn’t much to see just driving through. It’s 50 miles of tall grass and trees. There is a marina at the end where you can rent a boat and fishing poles for a whole or half day.