"Could we, as a community, come up with a definition for "being a dick" that everyone finds acceptable?"
Not without running into the same problems I've already highlighted. The more specific a rule is, the less likely it is to be enforced arbitrarily. I always assumed that when rachel said the "don't be a dick" rule would only be a placeholder for future, concrete rules, that that would actually happen. Unfortunately it never did, and nobody knows what is actually allowed vs. what is not allowed aside from what someone may have said weeks or months ago.
Awww... Thank you for your interest in helping us come up with rules. Remember, wetfish is a wiki and you are encouraged to help define the rules with us. This conversation itself is a part of the process.
Overall, I'd say you're still acting like a dick. It's not limited to the mean things you say to people, but also your tendency to make assertions about others. The way you speak is generally accusatory; talking at people, telling them how they feel, and how they are, instead of asking them questions and engaging in a dialogue.