I don't use tickets. To me, a ticketing system is nothing but a detailed up-front plan, waterfall at it's worse. If I see something that needs doing, I just do it. I also don't use backlogs for the same reason.
@allenholub tickets are often used in orgs less for "what to do in the future", and more for "what did we do already" either to provide A) evidence of value delivered to budget makers or B) key information in escalation communication to SME.