I tend to write about the same things a bit because they're my interests. Sounds simple, doesn't it? Well I'm not going to all of a sudden write about logging or China or bees because I'm don't know much about them. Now, when I get a feeling that something is very wrong or very right, then it's time to pick up the laptop.
With all that said, if you're against legal marijuana or if you're against marriage for gay couples, it's time to give it up. You've lost the battle. Find some new causes.