I am more patient if the person is vulnerable, due to age, or learning difficulties, or whether the person is going through a bad time (Depression), or suffers from other mental health issues, as I find that my sense of compassion in these situations seems to motivate patience in me. However people who appear healthy and able bodied who show rudeness and a lack of kindness to others and a need to get ahead of other people I have very little patience for. I have very little patience for technology, as I am more a nuts and bolts spanner man. This is because I guess that I like to be in control, and if I'm confident that I can sort out problems, then I work towards solving any problem, however if that problem cannot be readily solved by my own efforts, I become frustrated which builds up my impatience. Just like when you have written a letter or piece of writing on your computer but did not save it, then to discover the computer has crashed, so that all that you have written was completely for nothing, then situations like this can test my patience.
I also do not like having to depend on others peoples help, but am quickly taken back with emotion if I receive help from others who have shown kindness.
I do however strive to practise patience, via meditation, my Art work and also keeping mindful of when talking to another person that a conversation isn't always about what I want to talk about, but that the other person might be looking for a kind of informal emotion support (Standing in someone else's shoes).
So I use a kind of tool box, made up with the tools of empathy, compassion, humility, insight, and focusing on ones own inner calmness (Mindfulness), to help me grow patience in all situations.
Before I got into meditation, I was a very impatient man, who would fall out with people readily, which always caused me great sadness as after calming down I would see that I had overreacted which would cause not only embarrassment, but sorrow, as I discovered that I had hurt other peoples feelings in the process.
So today I remember the law of cause and effect, and would rather try to keep my patience than create a scene where I could cause someone any pain.