I like the Kylo Ren character, for a lot of the reasons you guys bring up. But he also is whiny and petulant. That's OK, though, because it works for making the character more interesting than what we typically see in movies. As someone brought up here, it's what Lucas was trying to do with Annie, but failed spectacularly in executing. He just came off as a weird psychopath who doesn't understand how humans talk or behave.
Superman though. . .also a weird psychopath who says and does very strange things. But understandable since he's just a freaky god-like alien. If I was in his shoes, I would probably also just feel burdened at annoyed that I had to "save" all these people and fight bad guys just to get this one attractive human to keep sleeping with me.
Aaaaand boom goes the dynamite. . .unless you're talking Star Trek: Into Darkness. **** that movie.