Some people collect stamps, others mountain bike and still others play with trains. There’s a lot of ways to spend your spare time. What’s your favorite?

Jim Graham of Annapolis, Maryland, is a self-described “aspiring underwater photographer.” A Petty Officer 1st Class in the Navy, he teaches at the U.S. Naval Academy. And yet, he still finds time to dive. He’s been doing so since 1998 and prefers the closed-circuit rebreathing technique, which makes use of a filter to clean the air beyond using a standard SCUBA storage tank.

One of his dearest memories is of hearing singing whales. He says he could feel the sound wrapping around him and moving through the water. In late August 2005, he took a trip to the Cayman Islands and encountered a sea sponge about six feet wide. On other trips he has encountered sharks, swam through schools of fish and passed right by sea turtles.

“If you've never done it before you should definitely give it a try,” Graham said of diving. “It's a whole new world out there."

What’s your passion? Use your photos and video to take us there with you. Below, you'll find a list of some of our favorite hobbies over at Team I-Report:

• Tyson Wheatley: "I like to collect rock concert ticket stubs -- particularly ones I've been to. I have about a hundred of them, and keep them in a shoe box. My favorite ticket stub is from a 2001 Radiohead show at Stone Mountain, Georgia."
• Meryl Page: "I’m a country girl, so my top three favorite hobbies utilize the elements of the planet: earth, water and air. I love mountain climbing –- my goal is to hike the largest ranges on every continent; snorkeling –- with penguins and exotic fish in the South Pacific or wherever the current takes me; and hang-gliding -- whenever I can catch a good thermal. I practice all three as often as possible in locations around the globe."
• Nicole Saidi: "My last real hobby was high school marching band (yikes), but I’ve been known to collect travel brochures and other mementos. I need physical reminders of trips. I also hesitate to share the fact that I collect animal-printed things. It started with a couple shirts and a hair clip and progressed to hats, scarves, gloves, shelving, fuzzy dice, pillowcases, bedspreads, shoes, socks, purses, luggage … the list goes on and on."