I commute all year round and leave at 6am winter and summer.
I love the bright summer mornings, everything just seems easier and more pleasant but when winter comes I get a different type of enjoyment, I think it's the sense of overcoming adversity on some level as poor weather just adds to the challenge. I do have a winter bike with full mudguards and a rack but I toyed with the idea of giving it a miss as despite what others say, salted roads play havoc with bikes and it's difficult to stay on top of it all year. I did a bit in the local velodrome which I really enjoyed but lockdown put paid to that but by that time I was back on the road anyway.
Long and short, dark mornings are easy, as is wet windy weather but salt does my head in and I can see myself retiring back to the track during January and February next year.