My son is sometimes 'over enthusiastic' because he is so happy and that behaviour could be interpreted as 'naughty' by some people (including me if I'm having a bad day)
Sometimes my son is angry/unhappy/sad/scared and that results in difficult behaviour because he can't process or express the emotions appropriately so he acts them out.
Sometimes my son is calm and relaxed and maleable because he is chilled and happy and is happy to go along with what I want.
Sometimes my son does as I say because I have frightened him and he wants to please me.
Surely one of the jobs of a parent is to tease out these complex tangled, messy relationships between emotions, behaviours and environment. If it were as easy as happy child=good or well-behaved child, or happy child= scared,cowed child etc parenting would be a lot easier than it is.