When I'm getting ready for bed I remove my watch and pop it on the charging dock on my bedside. In the morning when I wake up I put it back on. Do you sleep with your watch or why is it such a pain to charge it at night like your phone?
It's not just the hassle of charging overnight but also the fire risk; charging Lithium batteries a metre from my head whilst I sleep is not an attractive idea.
Hence I charge phones and laptops during the day and only when someone is around to supervise.