Post your transit pet peeves

One pet peeve that gets to me is something that's done on a lot of commuter railways and S-Bahns, the 10/20 minute schedule. The schedule looks like:

2:102:202:402:503:10

etc, when it should be like this:

2:102:252:402:553:10

This minimizes waiting and allows for frequent service every 15 minutes.

What are your pet peeves?