Thought I'd contribute to the wool tank top thread. I love them on other people but struggle a bit with both length and what to wear them with.
Here are mine, my favourite is the yellow/grey one which is a silk/wool blend that I got from someone who makes them and sells them on Etsy. The roll neck seems to suit me and the length is just right for my petite frame. The roll neck means I can wear it with any long sleeved top without worrying about the neck looking weird.
She also made the raspberry one, which is alpaca. I love the colour but it's a bit longer and has a kind of boat neck which I find harder to style. I don't think the shape suits me as much.
The blue one is Me&Em cashmere and I do like the shape/length, but again I don't wear it that often as I don't have many things it goes with. In theory I could wear it with a shirt, but I'm not a big shirt person. I do have a few silk shirts I like that could go with them, but that almost makes me feel too dressed up!
I also find the weather changes rapidly from being too cold for just a wool tank instead of a cardigan/jumper, to too warm for a wool tank.
I do understand how some people find them hard to make work. I have tried some in the past that look ridiculous on me. They can hang off my boobs and then stick out really wide at the waist in just the wrong place.