Collecting
Men can become involved in many different types of collecting. Sports fans collect items such as autographs or memorabilia from their favorite players or teams. Fans of celebrities collect similar keepsakes. Collecting can also provide learning opportunities such as collecting stamps, coins or antiques. He not only collects the items, but researchers their history and learns about the items he collects, as well as American or International history that pertains to the collectible.
Gardening
Instead of shopping for everything that he cooks, as a hobby a man can get involved in growing his own food. He spends time researching the types of food that grow best in his area and the types of soil and care that those plants need. He then spends the time preparing his food long before it goes into the oven or on the grill. The quality of the food he serves can be influenced by the care he gives it while growing.
Card Games
Many different types of card games exist to occupy men's time as a hobby. Card games such as bridge and poker may be learned quickly, but can take a long time to master. Becoming skilled in the games requires time to be spent on reading about the game, playing it and learning from others who play the game. The challenge of improving and excelling can provide years of entertainment as a hobby.
Meteorology
Meteorology is a science that experts spend their lives researching. It's not a science that can be learned quickly as a hobby, but it can be followed and researched as a hobby. The hobbyist can visit websites dedicated to the science and attend seminars and conferences on meteorology directed toward the amateur hobbyist. It will allow him to start to understand the factors that contribute to weather phenomena such as hurricanes, tornadoes and blizzards.