I'm a night owl surrounded by larks.
I think early rising, achieving and productivity are well overrated. The larks in my family claim moral superiority, not realising there is no light without dark. They are bland, joyless and uncreative people and they bore themselves into sleeping by 9pm generally.
There's a reason why romance, bonding with newborns and philosophical awakenings tend to happen at night. Business, politics, science and all boring things look like they happen in the day... but the cogs and thinking behind anything important run late through the night.
Nocturnal animals are wiley and cool. Just compare the nightime cat who speaks in silence yet owns you, vs the in-your-face yapping daytime dog, always desperate for your love.
Anyway, i am an owl in lark feathers, thanks to a boring corporate job and then kids.
Earlier at 8:30pm as DH could barely keep his eyes open, I said, "We'd have more and better quality sex if you were an owl."
He said the same back to me replacing 'owl' with 'lark'.
We are as different as night and day. My advice is you can certainly train yourself into larkness, but why if you dont need to?