I started Open RP with that sentiment, and had to refine it slightly.
So, hugs and I share here that focus on positives and please keep the negatives away.
(from Open RP LS)
I really feel there is only one rule I would set: "Be excellent to each other"
More focus on: positive takes on things, RP Relevance, thank-you, tolerance, respect, hugs
Less focus on: profanity, complaining, hogging the chat, personal attacks, off topic