The front porch provides a great place to take it easy while you take in the world. You can just see the ocean in the distance, and closer in, the folks walking to the beach provide people-watching entertainment.
On the summer weekends, the porch provides a great view of the Friday and Saturday fireworks.
SPI is one of the premier kite-boarding sites in the world, with enthusiasts coming from as far as Hawaii(!) for the exceptional beaches and the Laguna Madre.
It's also, obviously, one of the best sport and saltwater fishing destinations in Texas. You can go deep-sea fishing for about $1800, fish the Laguna Madre for redfish, trout, and flounder for about $350, or fish off the jetty or in the surf.