Afrodyte
Explorer
As a player and DM, I don't like feeling like my hobbies are like job interviews, so I don't go for the "audition" thing. I typically just be up front about what I'm looking for and what I want to do with the game, and people who fit the bill tend to make their way to you. I find that knowing what your game is all about and exactly what you are looking for when adding to your group goes a long way toward weeding out the undesirables.
In the descriptions, I tend to stay away from vague, judgemental words like "mature" or "good roleplayer" or "fits in with the group." Things you do want to include are: when and where you play, play style (interaction, tactics and strategy, problem-solving, etc.), the setting, power level, your goals for the game, and a brief description of the group (not the party, the group). From there, most people can decide if the game is for them or not. Anyone who enters a group knowing full well that the play style, schedule, and location of the game doesn't suit them can be easily dismissed for being a you-know-what.
In the descriptions, I tend to stay away from vague, judgemental words like "mature" or "good roleplayer" or "fits in with the group." Things you do want to include are: when and where you play, play style (interaction, tactics and strategy, problem-solving, etc.), the setting, power level, your goals for the game, and a brief description of the group (not the party, the group). From there, most people can decide if the game is for them or not. Anyone who enters a group knowing full well that the play style, schedule, and location of the game doesn't suit them can be easily dismissed for being a you-know-what.