The Crimson Binome
Hero
My pet peeve in terms of player behavior is anyone who makes a Chaotic character and treats that as an excuse to murder innocent NPCs. It's not an excuse. Murder is bad, and NPCs are people too.
I play a lot of Adventure League. My personal pet peeve is people who manage to get their characters to lvl 5+ and somehow still don't know the basics of how their character works.
Another thing that irks me is when players take an excessive amount of time to decide what to do on their turn BECAUSE they're afraid of doing the wrong thing.
There is no such thing as "doing it wrong" in my games. No matter what you do, even if it results in failure, it will (eventually) result in something fun and awesome. I promise. So just take your turn, do something awesome ... anything ... and it will all turn out okay, I promise, even if it wasn't the most numerically effective action you could have taken.
I've only ever seen one game /not/ do that at least a little, and, ironically, it was a parody game (called HoL - I'll be shocked if anyone's even heard of it - c1994, I think). It not only matched those three things up, it lampshaded 'em - for instance, there was an entry in the weapon table for "spikey-chainy thing on pageXX" (with an actual number, not 'XX' - the right page number, even!) with stats that made some modicum of sense for the crazy thing.
I think there was another parody/comical type game called TOON that came out ib the late '80's as well?
Hey!
Just because every character I have ever played since, um, well, um, the Disco era has been called Legolas ...
And just because that character may have been an elf ...
And just because that character might have been the AWESOMEST ARCHER EVER TO ARCH WITH ARROWS AND AWESOME SAUCE ...
Does not mean you get to judge me!!!!!111!!!!!!!!!!
Orlando Bloom 4EVa!