To reassure DS1 was a pain in the ass baby although in retrospect he wasn't so bad I suppose... Or do I just have Rose tinted glasses now?! but at 10.5 months he found his feet and that was that. He turned into angel child overnight! 
He didn't go through terrible twos and was just angelic pretty much til 7. That's when me and his dad split up, and very slowly he's changed. Now he's a cheeky prenager. Thinks he knows it all, and answers you like you're his mate. Thinks he's good at lying. He isn't!
So we got a good 7 years of loveliness! I'm sure it will come back in a few years. Underneath it all he's a good egg!