I love kale. Def my favourite cabbagey thing. I find most supermarkets only sell it chopped up in a bag, with rough, browning ends, which is a bit off-putting. I use that to make 'green soup' (something we have with sausages or a bit of pork belly in cold months).
The whole leaf stuff is so much nicer.
In Germany you get a dish called grünkohl (which I think is also the word for kale) that is long slow cooked kale with pork fat and speck. Had some from a stall in a Christmas market in Berlin a few years ago and it was delicious.