James West wrote:The last one's name was "Gucci Pucci" and was just over 3' tall; Of half Klingon and half some species I've never heard of with some flying saucer thing over it's head that "extended" when the character got angry or horny (Which one is worse, I don't know).
...I know that person.

The flying saucer thing bugs me too. >.<
Anyway...
Star Wars/Star Trek cross overs. I'm sorry, but that just does not work. One is set in the future of
this galaxy, evident in that it has
Earth. The other is "a long time ago, in a galaxy far, far away". Yes, Star Wars has "humans". But you cannot combine it with Star Trek. It simply doesn't mesh up.
People who continually join and then resign from an RPG are another big one.
Especially if they play a major character (such as a senior staff officer).
People who constantly misspell the most basic of words or Who Type Every Post Like This. The former is simply irritating; the latter is painful for me to read.
"Mixed breed" characters that don't make sense. Like...anything "half Caitian". I mean, come on. Not that there's much canonical information on Caitians, but do we really need that mental imagery?
Stealing. Whether it's stolen from another RPG, a TV show, a movie, whatever...just no. Have some pride and use your brain to create something that's
yours. Inspiration is one thing; plagiarism is another. Particularly blatant plagiarism? That's grounds to get kicked off my board and most of the ones I belong to.
Players who write the same character everywhere. Seriously, what is the fun in that?
RPG boards with ridiculous rules. Some of the boards I've seen - even some of the ones I've played on - had some
really strict, unnecessary rules. I can understand asking for a minimum number of posts a week and a certain post length. I can understand insisting on a certain tense and point of view to avoid confusion. What I don't get is boards where there's no freedom to be creative. Where people can't so much as post something like "She shut down her console and got up, stretching as she did so. Her back was sore from sitting in the chair for so long, so she decided to walk down to the mess hall for a cup of coffee. (etc.)" because "Oh, you can't leave the bridge during duty hours. And you're always on duty in mission posts."
Genetically engineered characters for the sake of having a genetically engineered character. Genetic engineering is illegal in the Federation. If someone wants to use it, they had better have a really, really good story behind it.
Super powers. Yes, it's cool to be telepathic, telekinetic, super strong, etc. But a character doesn't need
all of that to be a good one. Now, if it's a species norm, sure. By all means. But that only applies to canon species or species already established for the RPG. If someone comes to me with a species write up where every member of the race is telepathic, telekinetic, super strong, able to speak multiple languages without studying, super fast, able to shape shift, and super intelligent...yeah that is not going to fly.
Characters that do not grow or change and that have no flaws or problems. We call that "godmoding". A character should be "real". By that I mean they should have flaws - maybe serious ones! - and have fluctuating emotions, maybe even medical or mental problems.
Players who make their character have "PTSD"...but they have no idea what PTSD is. This applies to any medical condition. If they don't do the research, it's going to irk me.
People who don't
ask before introducing plots or plot twists that will affect the entire crew or all members of the board. This is a major turn off; it means they are not team players, and I don't want to deal with that.
Players who do not know what their role actually entails. For example, if you play a nurse then you do not diagnose patients, prescribe medication, or release patients from sickbay/the hospital. If you play a psychologist, you do not prescribe or dispense medication (that's psychiatry). So on and so forth.
Players who jump in and do another person's "job". This may very well be the biggest. If I am the Chief of Security and you are a civilian, you stay out of it and let me do my job. If I am the Chief Science Officer (say with a degree in planetary science) and you are the Chief Engineer, butt out and let me do the science-y technobabble.