Gd gave us life to enjoy. A successful couple can have similar interests or not. The most important thing is to respect each other's ideas of fun. One partner may think an ATV ride through the jungle is exhilarating while the other wants to relax on the beach all day. It’s all good fun! Find commonalities and enjoy them together while supporting your partner in their own idea of enjoyment and adventure. The fun goes out of many marriages when children and work begin to overwhelm the relationship. Make a concerted effort to keep fun alive. Supporting connection, reinforcing laughter and positive bonding will make the marriage thrive. As they say, 
"Laughter is the best medicine."