Wanted: Child Who Naps Well

Lauren fell asleep in her highchair after dinner the other night. She looks cute in this picture, but this is a symptom of an ongoing problem: she hates taking naps. Lauren has been an excellent sleeper at night almost since she was born. When she was a month old, we only had to get up with her once a night, and when she was about two months old she started sleeping for 10 hours straight--much to our delight. So it doesn't seem like we should be allowed to complain, as many parents would love a child who sleeps that well. However, these good sleep habits don't apply to daytime. She fights her naps almost every day, 2 to 3 times a day. I've tried all the "expert" sleep advice I can find. She has consistent nap times every day, she almost always sleeps in her crib, we do the same pre-nap routine every time (consisting of playing the same music, turning on an air purifier for white noise, and rocking her for a bit before going in her crib)--and yet she resists almost every time. Even when I do get her to sleep, she won't sleep for long. I consider myself lucky if she sleeps for an hour or more, since she is usually awake after about a half hour each time. She definitely needs more sleep, as she gets grumpy and whines when she doesn't take a good nap. So, all you moms out there, any advice??