I agree 100% with what pioyt had to say....if I wouldn't do it to my DH or want someone to do it to me...I don't do it.
We have never ever had a routine sleep time/nap schedule or anything like that...people in our house sleep when they are tired, wake up when they are ready to to play or work again and eat when they're hungry, etc...we just don't fight about sleep around here...but maybe DD is just "one of those kids" who sleeps well...I don't know, we have never had a problem.
I believe that the body knows when it needs to shut down and recharge, just like it knows when it needs to refuel...there have been times when DD has been so tired she could hardly walk straight...but if I tried to suggest sleep to her she wasn't game and became upset...so, generally, she tells me when she needs to go to sleep and THOSE times when I bring her to the big bed to lay down she sighs and giggles and wiggles her feet....so, I don't know. I would rather promote a relationship with sleep that has her giggling and toe wiggling than wailling....I know a lady with a son who won't even go into his room to play because he won't go near his crib, if he even SEES his crib he starts freaking out, I'm guessing because he thinks he is about to be forced to go to sleep and he knows that it will mean crying and struggling, etc...that's terrible. I would hate to have a kid who associated his place of rest and dreaming with fear, crying and upset.
Sistees, someone above said it best "You know your childs needs the best" - so...do what your gut is telling you to do I guess...I agree with a PP who said that sometimes kids in that age range are too "thirsty for life" to want to go to sleep when they're tired...I remember when I was a kid being like that with the bathroom...my body was clearly telling me I needed to go to the bathroom but I didn't want to go inside because I was having too much fun playing...so, a couple of times that ended up being a not-so-great decision, if you know what I mean!