#precreasing

I've been folding for a few years now and I've gotten into the habit of precreasing all my models before I start folding. It saves me a ton of time and helps me avoid mistakes. But I was wondering if this is something that everyone does or if I'm just being weird. I mean, some models are pretty complex and it seems like precreasing would be a must, but maybe I'm just overprepared. Anyone else out there precrease their models or am I just being extra cautious? I'd love to hear about your folding habits and see if I'm the only one who does this.