Just a small pet peeve. I know wealth of quality discussions and content is the key to a healthy community, but I find lack of an icon or banner to be a turn-off signaling low effort, especially if the community has been around for more than a week or so. Meh. Just my 2 cents.
I’m not put off by them personally, but I find that I do tend to overlook or mix up those without any icon to help distinguish them, especially those communities with either the same or similar names.