Anyone’s puppy super chill?

I have a 12 week lab and for the last 4 weeks we have had him, he is incredibly chill. Gets a wave of energy in the evening but it consists of mostly chewing on his toys and some humping but beyond that, he moseys everywhere. He has his moments of chasing my kids here and there but beyond that, doesn’t get overly excited. Just curious of anyone else has or had a puppy like this and if this kind of temperament remained or if they turned into total nuts in due time?