Sign that you will have a successful career and will get things done: you didn't listen or care what the list was.
Seriously, these lists mean nothing. This list is some guy sitting behind a computer who may or may not even be a good developer (I didn't check though), and telling you how you know if you are a good developer based on some arbitrary lists that are his own opinion. Listen to yourself, constantly improve and have a thirst for knowledge and you will be a good anything, not just developer. And if you are not a great developer, there are tons of developers that make huge amounts of cash that are probably not that great at actually designing and writing code, but they can get the job done. Who cares if some list says you are a good/bad/terrible develop, you do you and you'll be just fine.
Exactly. The author even says he doesn't understand why someone would be fired for teaching a junior everything they know as long as they are a good enough programmer. Career management is completely othorgonal to programming ability, and career progression is surely a function of both, with luck thrown in.
The irony being that you've just provided another alternate list!
I think your comment makes good points though. The OP makes a lot of good pints as well. The bits of humor make it clear to me that it's not supposed to be taken literally. This is just a list of indicators.
"Listen to yourself, constantly improve and have a thirst for knowledge..." is pretty general advice. He explicitly says it's not specific to being a developer. I don't think, "constantly try and better yourself" as an over-arching life motto is any way equivalent to "buying plushies at ThinkGeek."
Side note, I'm pretty sure the author stole half of his various bullet-points from the DSM's diagnostic criteria for autistic spectrum disorder.
Seriously, these lists mean nothing. This list is some guy sitting behind a computer who may or may not even be a good developer (I didn't check though), and telling you how you know if you are a good developer based on some arbitrary lists that are his own opinion. Listen to yourself, constantly improve and have a thirst for knowledge and you will be a good anything, not just developer. And if you are not a great developer, there are tons of developers that make huge amounts of cash that are probably not that great at actually designing and writing code, but they can get the job done. Who cares if some list says you are a good/bad/terrible develop, you do you and you'll be just fine.