Jakabella - yep we are the same.... we don't see why we should force her to sleep if she doesnt' want to and it only upsets her.... so she just sits up and plays on the floor and rolls around etc.... she then lets us know when she's really had enough... (finally LOL!).
You are lucky in that if you have a bad night, you can have a few hours sleep in the day!!!

Don't get me wrong, some days DD will sleep a 2hr sleep sometimes 3hr sleep! but not every day....