@transcendentempress (d&s 5e, for context). I ignore weight and jumping rules. I think I'm the stingiest DM in the known universe as I do require players to track their gold, and they usually have to save up for nice things. That's not intentional, I'm maybe taking the DM rules on treasure too literally. I ignore spell components unless there is a gold cost associated with the spell. I also ignore passive perception, simply as it renders active perception a bit pointless.