Collecting AIDS stamps
Collecting stamps about AIDS awareness is a fun and easy hobby. You can spend as much or as little as you'd like on your collection. In addition, your collection doesn't have to be designed with the same "rules" as mine. Many people enjoy collecting first day covers, for example. Others collect stamps that are cancelled with special AIDS awareness cancellation marks. Some collections contain stamps of famous people who have died of AIDS (such as Arthur Ashe or Freddy Mercury). Still other collections are those in which AIDS is collected as just one of many diseases featured on stamps, such as breast cancer. It's all about how you'd like your collection to read, as well as how much you are willing to spend on the hobby.
If you decide to collect stamps, I highly encourage you to put your collection on the web. It's an excellent way to share your collection with others, and will increase your own enjoyment as well. I'm happy to link my site to similar-themed collections on the web.