Had a college friend. Fun guy, but what started as "a little unreliable" when we lived on campus together turned into "massive flakey ghost" when we didn't. Drove me a little crazy. Eventually another friend said this guy doesn't respect me and I should stop wasting my time. I don't remember if there was a clean break but we haven't talked in years. I doubt he thinks about me at all, but he's a sort of archetype of one kind of asshole for me.
But I'm kind of insufferable myself, so there are probably a handful of people out there with stories about me. Welp. Nothing to do but try to do better.