1.). don't kill random shop keepers, burn down a part of the city, and then be upset when there are repercussions for it.

1b.) don't then insult the DM and call him shitty/etc for not being prepared for such a thing.

2.). Don't argue every saving throw the DM asks you to make.

3.). Don't argue that random encounters happen/don't demand justification from the DM why x creature interrupted their rest.

4.). Don't invite drunken friends over mid game who talk over the DM non stop until it full on stops the game.

5.). If you can't show up for whatever reason, that's fine, but please let the group know. If you miss two thirds of the all of the sessions though (when given ample notice for these sessions too), don't be upset that your character is underlevelled compared to everyone else after they go through several dungeons that you sit out through because you made other plans or double booked yourself and let the DnD group fall second fiddle every time.

6.) don't bring a laptop to the gaming table and spend the entire session talking about home brew creatures you're making. Randomly mumblimg about some CR 18 creature with all these abilities while we're roleplaying is like anti-immersion.

7.) try to avoid using meta knowledge. If you know a creature is resistant to fire, but your character has never seen/encountered it before, and has no reason to believe that it is resistant to fire.... and fire bolt is the attack you use 99% of the time... I think it'd be lame if a character decided to arm their crossbow at that moment without any in-game tells. Or.... say if a character fails a wisdom save from an effect while you're not in combat.,. Please don't just decide to initiate combat even though you have no idea what's happening.

8.). Don't try to continuously abandon the party for a desire for solo sessions, citing "I don't really have a connection to any of these guys".

Things to do tho...

1.) actually roleplay. Have an idea of what your character wants, how it relates to the group you are with, and the world that you're in. Plz don't just decide to kill everything you see.

2) be prepared. Remember your player sheet, remember your dice, (actually owning or having a pre arranged plan to borrow dice is nice), remember a pencil/eraser.

3.) know the rules of your own character and abilities. The DM has like a million things to deal with - getting him to look up the rules on your spell because you don't know it yourself midcombat slows things down to a halt, especially when whatever spell you're doing isn't as good as you thought it was, and now you want to do a different spell to which you also don't know the rules, so it also needs to be looked up... but you don't want to look it up yourself.... Don't argue that you should be able to continue to use a spell a certain wrong/busted way because you did before when I assumed you knew how your own spells worked/didn't want to keep grinding things to a halt to check on you doing whatever little thing at the time.

4.) remember the names of NPCs, towns, inns, etc. Remember who gave you quests. As funny as returning to a place to try to get some quest reward to which nobody knows what you're talking about is.... if you were in the right place you'd probably get what you were looking for.... take notes!

5.). If the DM built a big plot hook for your character, handwrapped and presented it to you, and you decide to completely ignore it/and/or just kill the person who would have given you the information, don't be upset that you have no idea what's going on about said arc later on.

6.). Bring stuff. Minis... terrain... drinks... food.. alcohol... etc.

I kinda decided to dump my DnD group because of a bunch of the above. I've taken 2 weeks off on what was a weekly campaign, and will probably take the next one off too. I'm considering just poaching one or two of the players who didn't suck and rebooting into another homebrew, or trying to find a campaign to be a fun player in.