So let me begin by stating I have met many and more non asshats than I have those who I am talking to here. But for those I have let me give you one last smidgen of credit that you just don't realize how your douchery is making you appear.
1. Stop thinking everyone wants to hear from you.
Take a second and either fill out your profile to let us know why we would want to get to know you more or at least put in your message what you read in our profile that encouraged communication.
2. Stop Assuming that a person's label is defined by you.
So you see Submissive or Slave...guess what chances are until you actually talk to them you will not know how they define that label. Chances are it isn't what yours is and guess what? It doesn't have to be.
So you coming in and demanding anything from kneeling, pictures or any other flacid fantasy in our mind before knowing the who and why of who you are talking to will quickly put you in asshat category.
For the record its not just Dominant issue either. As Subs we need to do the same and not expect that if the person we assumed by title was going to be the end all to your needs and wants...sit in the chair next to said Asshat above.
3. Stop thinking you are the 2.0 to what someone has or experienced.
If you see that one is taken or just gotten out of a relationship do NOT come in assuming that you can or will be better than. Be you only you. Trust me works are cheap and actions will either void or validate those claims quickly. Barging in assuming you will be a better/twuer xyz than what is currently in the dynamic isn't only rude but creepy as well. Karma is also a bitch and if they will leave another for you asshattery they will also fall and leave you for the next asshat, and you will have deserved it.
Same for swooping in on a rebound. Tread carefully.
4. Be Yourself as You are.
For all that is good and holy: DO NOT promote yourself as being bigger bladder better than you are. I won't digress further since I have another blog that touches on this topic alone. Just don't do it.
5. Don't Yuck another's Yum.
So I heard it put that way over the weekend and yes, its the whole my kink ain't your kink but its still a great way to avoid being seen as a twue asshat.
Just because someone else defines or does something different than how you process it doesn't make it work or any less twue than your way. To demeen another's way is only to make you the fool in the mind of most.
I am sure there are other ways or ideas as to what makes an asshat and encourage you to comment with your own. These are just my top 5 that usually shows up in my inbox at least once or twice a week.