*brushes dust off topic*
My biggest one is grammar and spelling. Is it so hard to take your post, copy and paste it into Word and run a quick check to make sure it follows the very basics of English grammar rules? Exemption provided to those who learn English as a second or third language and those who may have a learning disorder or mental disability.
Second, those who play canon alien species but do not research anything about the culture, naming conventions, or history. Andorians have four sexes and their last names have a prefix depending on their sex attached to it. Betazoids have black/dark brown eyes, not blue, green, etc. El-Aurians are far and few between (it is highly improbable that there are as many el-aurians as there are characters across the entire ST:RPG spectrum. Choose another species for Pete's sake). Vulcans do not usually cross breed with other species unless the situation precludes and forces it to happen (stuck away from their bondmate in the midst of
pon farr, raped, single due to some event or another, etc.).
Subpoint, hybrid species. I wish people would quit crossing species that do not need to be crossed! Vulcan-human, human-betazoid, klingon-human, bajoran-cardassian, human-romulan, romulan-vulcan (e.g.
Soleta) - the ones we've seen in canon are fine with me, but combining some species with others...Really now? And playing with the most minor of their powers (e.g. Deltan's apparent ability to heal with touch or apparent El-Aurian telepathy) to create a character with those abilities (just imagine a deltan, el-aurian, betazoid, orion, full telepath...it has been done, I've seen it)? *coughgodmodcough* I'll shut up now before i start naming names or combinations (other than the one i mentioned) I've seen which are rather specific, though...
Walls of text. We've all seen them, those people that post nothing but an extremely long sentence that is a huge run-on with no pauses in it that causes your eyes to gloss over as you try to read it and understand it with their life story embedded into it and you're stuck sitting their thinking "WTF?" as you try to read it but realize the poster just said a bunch of nothing and led you on a loop like I just illustrated. But seriously, this ties in with my first peeve. Run-on sentences need to be separated. your character cannot also be expected to have said such a huge sentence without pausing at least once to breathe unless they're like...Superman or Aqualung or something. And the fact I learned nothing about your character (feelings, gestures, facial expressions, etc.) when I only see, "Ensign
(name) then said, " *wall of text* " "
Then the usual godmodders, super beings, rambo's and/or gun-toting, "blow them up ask questions later" type.
/*end rant*
Five years of online gaming has led to some interesting experiences....let's just put it that way.