I usually play smokes, but when I don't, I personally run into controllers who:

-Don't use mic
-Smoke right off the rip, only to have entry stalled by mollies and the smokes expire
-Omens who put down inaccurate smokes because they did it too quickly

^All things I avoid doing. Was wondering if anyone else has complaints regarding controllers in solo queue so we can help stop you from being op'd