Frequently I come across "helpful" advice telling me to drop everything in my life and just write. I've come to the conclusion, however, that such advice is for people who aren't really writers. For me, writing is more like drinking too much or eating all the leftover Halloween candy: strangely compelling and life-sucking. I have to forcibly hold it down and choke it. Otherwise, nothing else will get done. Nothing.
I'm only being a little bit ironic here. I guess what I'm saying is that I can see why great writers have tended to destroy their marriages and desert their children. There's a line of obsession that's too easy to cross. If you don't cross it, you think: "I won't be great." And if you do cross it, you think: "I ruin everyone I touch."