How to Take and Handle Rejections
So I'm fairly certain a post like this hasn't been posted yet. There has been something like this for a game app, but not for PSLs and general. If you'd like to add anything, feel free to post suggestions. This is just something I wrote out of frustration with both sides after trying to drop a line gently, only to get into a fight with the player.
Taking In Rejection Tips and Tricks Understand that when someone is rejecting you it's not because they don't like you, but because they don't connect to your writing. Don't take it as a personal attack, understand that some styles just don't click.
Role Playing is about having fun, and exploring characters. However, there should be the same values between players. If one player values pots over spelling errors, and the other player is nit-picky about spelling errors, but enjoys more character driven plots then there are going to be some clashes. When you find a potential partner, and it's not in their 'about me' post, ask about their limits and expectations in your request comment.
Finally, when someone is critiquing you, don't take it as an attack. They are telling you honestly about how they feel about your character, not you. If it feels like an attack, or their comment is, 'i really don't like your characterization', instead of insulting them back, ask something like, 'what don't you like about him?'
Giving Rejections Tips and Tricks Some of us are picky writers. Some writers expect novel length posts and the like while others expect no more than a single paragraph. We all have different values. Personally, I prefer quality over quantity, and my posts tend to be on the short side. Others like long posts that give about two actions and show inner character monologues. This is fine, but I would post this somewhere in your about me, or what I role play post. Be specific about what you value in a post and Role Player. Let people know what your minimum length is as well as your maximum. Things like that help keep away unwanted player styles.
Regarding constructive criticism. If you don't like something about a character someone plays, or the way someone is playing a character, be honest about it. For instance, a lot of players like to see Draco Malfoy as a bully whose really a troubled teen that has problems at home. Others like to see Draco as a bad-boy archetype and still others play Draco as an insecure teenager fumbling through a changing society. These are fine, but even more players like a mixture. Again, you have to be specific about the archetypes you like in a character. If you don't like how a player is portraying them, let them know what specifics bother you. Try to offer different suggestions, or agree to disagree if your player doesn't want to change. While it's good to convey honestly about how you feel about a characterization, saying 'i don't like your character' makes people feel attacked and cornered. Try something like, 'I don't like this aspect of your character'. That way you give you and your partner a chance to manipulate the character in a way you both approve instead of abruptly ending the line.
Finally, once again I must stress that Role Playing is about having fun, and while there are high quality writers out there, don't be too picky about who you play with and what style you play with. Be adaptable. You have a wider range of players that way and a lot more varitiy. Also, don't automatically decline someone because of their length they write in, give them a chance to write you an example of some kind. You may be pleasantly surprised.