I've just finished working through a book on atmosphere and weather (my first science textbook I've read in Finnish) and it turns out there's tons of stuff I haven't known.
One interesting chapter was about light phenomena associated with various kinds of hazes. Turns out ice crystal hazes are specifically interesting, because the crystals have a regular structure, that structure is non-trivial (there's all sorts of crystal shapes dependent on temperature), they're basically all the same, under certain conditions they're even arranged roughly the same way, and this gives rise to a whole zoo of halos, rings, arcs and other phenomena that can be observed (the book lists a good 30 different ones). In contrast, liquid droplets are always round, so the only parameter that can change is the size distribution, and dust is always irregular - so dust and water droplet scattering is much easier than ice.
I couldn't resist to persuade ALS to do some of the more common ones, so here we go:
That's the 22 deg ring generated on a high cloud layer (it doesn't look too ring-like here, but you can sort of see the upper right arc really far from the sun - it also doesn't always look perfectly ring-like in reality, most of these are subtle). It's one of the most common phenomena, since high hazes are almost always frozen and not really rare, and you get to see the ring against a dark sky background.
That's a light pillar and a side-sun generated on low ice haze - they get cut off from below when the haze gets too dense, but there's a sweet spot where they appear most prominent. They're both fairly common phenomena as well, but they tend to occur for low sun only - which isn't so much of a problem in winter really.
You can look forward to see the whole package integrated with the weather system for Christmas