At least he sleeps well...

Once he falls asleep that is. When I say that seth hates sleep it's only the initial falling asleep part. Once he passes out he sleeps like a rock and for that I am most fortunate. But how do I get him to fall asleep better? Omit naps? Wear him out more ( without wearing me out)? i don't know what to do. Will he outgrow this phase? I know as a kid i never liked going to bed, could it be a hereditary trait?