That's a great question! As someone who deals with this daily, the most frequent complaint is definitely overflowing bins. When cans are too full or not emptied regularly, it creates litter, attracts pests, and looks terrible. It's the number one thing to watch for.
A very close second is odor and pests. In warm weather, especially with food waste, bins can smell awful and draw flies, rodents, and even larger animals. This is a major hygiene concern for residents and businesses nearby.
People also often complain about poor placement or lack of bins. If cans are too far apart, hidden, or missing in high-traffic areas, people end up littering simply because there's no convenient option. Conversely, bins placed too close to benches or building entrances can create nuisance.
Finally, issues with design and maintenance come up. Lids that are broken, difficult to use, or missing altogether don't contain waste or smells. Recycling bins that are constantly contaminated because the system is confusing also generate a lot of frustration.
My advice? Watch out for bins that are consistently overfull, notice if there's a persistent bad smell or pest activity, and observe if litter tends to accumulate in specific spots where a bin might be needed. Supporting regular maintenance schedules and clear signage can solve most of these common problems.