Here are some great pics that we have taken of the Island...
Playa Parguito, is on the north eastern side of the island and boasts the largest waves of the island. Parguito has some wonderful restaurants along the beach and bars.
Playa Guacuco in my opinion is the best beach on Margarita, and great for families, it stays very shallow for a long way out and still has good waves. It also has restaurants and bars. This photo is from the north of Playa Guacuco.
Here are a couple pics of my family on top of a hiking trail over looking the eastern part of the island about 10 min from Sambil Mall. 
The Grocery market
More pics