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:
2:10
2:20
2:40
2:50
3:10
etc, when it should be like this:
2:10
2:25
2:40
2:55
3:10
This minimizes waiting and allows for frequent service every 15 minutes..
What are your pet peeves?
A ton where I live but it's all because of lack of funding and car centric infrastructure. My top would be how unsanitary it is when you're forced to pile up with others in a really small space that shouldn't have so many people inside.