Are you circumsized?
Cut penises precum less than uncut penises, for some reason. (Something about the nerves in the foreskin reacting better to blah, blah, it's all science.)
I just had this convo with the other day on this site with another hung dude. I'm not sure if it's nature or what it is, but I leak like a hose. I can coat my entire long dick with precum i ooze that much out and so did the other dude I talked with. This is an interesting thread and one I hadn't thought about much, other than with me the amount of precum is so much I can actually milk it out of my dick as i get aroused.