Alfie was a nightmare from about 8-18 months, if dogs could give you the finger he'd have done that every time I asked him to do something
He was really hard work (him taking himself off hunting and chasing birds were the main issues) but he came good in the end... for the most part
Rodaidh hasn't had a 'teenage' phase, his training was full steam ahead from 6 months on and he got distinctions in two working tests on the same day at 11 months old. He's a character but he's incredibly biddable and eager to please. His dislike of other male dogs in 'his' territory came with maturity rather than adolescence.
I didn't get Tills until she was 2 so with her I don't know, she's such a well behaved girl I can't imagine her ever being any different. That's not to say she does everything I tell her to though, she knows her own mind and is a master of the art of ignoring you if you ask her to do something she doesn't want to as Jo will agree